UNITED STATES
                        SECURITIES EXCHANGE COMMISSION
                            Washington, D.C. 20549

------------------------------------------------------------------------------


                                 SCHEDULE 13G

                   Under the Securities Exchange Act of 1934
                              (Amendment No. 1)*

                                  JAMBA, INC.
                                  -----------
                               (Name of Issuer)


                   Common Stock, $0.001 par value per share
               ------------------------------------------------
                        (Title of Class of Securities)


                                   47023A119
                           ------------------------
                                (CUSIP Number)


                               December 31, 2007
                           ------------------------
            (Date of Event which Requires Filing of this Statement)


Check  the  appropriate  box to  designate  the rule  pursuant  to which  this
Schedule is filed:

                             [ X ]   Rule 13d-1(b)

                             [   ]   Rule 13d-1(c)

                             [   ]   Rule 13d-1(d)

* The  remainder  of this  cover  page  shall be  filled  out for a  reporting
person's  initial  filing on this form with  respect to the  subject  class of
securities,  and for any subsequent  amendment  containing  information  which
would alter the disclosures provided in a prior cover page.

The  information  required  in the  remainder  of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities  Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however,  see
the Notes).


                         Continued on following pages
                              Page 1 of 11 Pages
                            Exhibit Index: Page 10



                                 SCHEDULE 13G

CUSIP No.: 47023A119                                         Page 2 of 11 Pages

................................................................................
1.   Names of Reporting Persons.

     I.R.S. Identification Nos. of above persons (entities only).


     MAGNETAR FINANCIAL LLC
................................................................................
2.   Check the Appropriate Box if a Member of a Group

     (a) [ ]

     (b) [ ]
................................................................................
3.   SEC Use Only
................................................................................
4.   Citizenship or Place of Organization

     Delaware
................................................................................
Number of             5.   Sole Voting Power                        0
Shares               ..........................................................
Beneficially          6.   Shared Voting Power                      0
Owned by Each        ..........................................................
Reporting             7.   Sole Dispositive Power                   0
Person With          ..........................................................
                      8.   Shared Dispositive Power                 0
................................................................................
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     0
................................................................................
10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions)

     [  ]
................................................................................
11.  Percent of Class Represented by Amount in Row (9)

     0% based on 52,602,756 shares outstanding as of November 16, 2007.
................................................................................
12.  Type of Reporting Person:

     IA; OO




                                 SCHEDULE 13G

CUSIP No.: 47023A119                                         Page 3 of 11 Pages

................................................................................
1.   Names of Reporting Persons.

     I.R.S. Identification Nos. of above persons (entities only).


     MAGNETAR CAPITAL PARTNERS LP
................................................................................
2.   Check the Appropriate Box if a Member of a Group

     (a) [ ]

     (b) [ ]
................................................................................
3.   SEC Use Only
................................................................................
4.   Citizenship or Place of Organization

     Delaware
................................................................................
Number of             5.   Sole Voting Power                  None
Shares               ..........................................................
Beneficially          6.   Shared Voting Power                187,500/1/
Owned by Each        ..........................................................
Reporting             7.   Sole Dispositive Power             None
Person With          ..........................................................
                      8.   Shared Dispositive Power           187,500/1/
................................................................................
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     187,500/1/
................................................................................
10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions)

     [  ]
................................................................................
11.  Percent of Class Represented by Amount in Row (9)

     0.36% based on 52,602,756 shares outstanding as of November 16, 2007./1/
................................................................................
12.  Type of Reporting Person:

     HC; OO


----------------
/1/ This figure includes 187,500 Shares that the Reporting Person is entitled
to obtain upon exercise of warrants to purchase the Shares.




                                 SCHEDULE 13G

CUSIP No.: 47023A119                                         Page 4 of 11 Pages

................................................................................
1.   Names of Reporting Persons.

     I.R.S. Identification Nos. of above persons (entities only).


     SUPERNOVA MANAGEMENT LLC
................................................................................
2.   Check the Appropriate Box if a Member of a Group

     (a) [ ]

     (b) [ ]
................................................................................
3.   SEC Use Only
................................................................................
4.   Citizenship or Place of Organization

     Delaware
................................................................................
Number of             5.   Sole Voting Power                  None
Shares               ..........................................................
Beneficially          6.   Shared Voting Power                187,500/1/
Owned by Each        ..........................................................
Reporting             7.   Sole Dispositive Power             None
Person With          ..........................................................
                      8.   Shared Dispositive Power           187,500/1/
................................................................................
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     187,500/1/
................................................................................
10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions)

     [  ]
................................................................................
11.  Percent of Class Represented by Amount in Row (9)

     0.36% based on 52,602,756 shares outstanding as of November 16, 2007./1/
................................................................................
12.  Type of Reporting Person:

     HC; OO

----------------
/1/ This figure includes 187,500 Shares that the Reporting Person is entitled
to obtain upon exercise of warrants to purchase the Shares.




                                 SCHEDULE 13G

CUSIP No.: 47023A119                                         Page 5 of 11 Pages

................................................................................
1.   Names of Reporting Persons.

     I.R.S. Identification Nos. of above persons (entities only).


     ALEC N. LITOWITZ
................................................................................
2.   Check the Appropriate Box if a Member of a Group

     (a) [ ]

     (b) [ ]
................................................................................
3.   SEC Use Only
................................................................................
4.   Citizenship or Place of Organization

     United States of America
................................................................................
Number of             5.   Sole Voting Power                  None
Shares               ..........................................................
Beneficially          6.   Shared Voting Power                187,500/1/
Owned by Each        ..........................................................
Reporting             7.   Sole Dispositive Power             None
Person With          ..........................................................
                      8.   Shared Dispositive Power           187,500/1/
................................................................................
9.   Aggregate Amount Beneficially Owned by Each Reporting Person

     187,500/1/
................................................................................
10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions)

     [  ]
................................................................................
11.  Percent of Class Represented by Amount in Row (9)

     0.36% based on 52,602,756 shares outstanding as of November 16, 2007./1/
................................................................................
12.  Type of Reporting Person:

     HC

----------------
/1/ This figure includes 187,500 Shares that the Reporting Person is entitled
to obtain upon exercise of warrants to purchase the Shares.




                                                            Page 6 of 11 Pages

Item 1(a).  Name of Issuer:

            Jamba, Inc. (the "Issuer")

Item 1(b).  Address of Issuer's Principal Executive Offices:

            6475 Christie Avenue, Suite 150
            Emeryville, CA  94608

Item 2(a).  Name of Person Filing:

            This Statement is filed on behalf of each of the following persons
(collectively, the "Reporting Persons"):

            i)    Magnetar Financial LLC ("Magnetar Financial");

            ii)   Magnetar Capital  Partners LP ("Magnetar Capital Partners");

            iii)  Supernova Management LLC ("Supernova Management"); and

            iv)   Alec N. Litowitz ("Mr. Litowitz").

            This Statement  relates to Shares (as defined herein) held for the
accounts  of certain  managed  accounts  (the  "Managed  Accounts").  Magnetar
Capital  Partners  serves as the sole  member  and parent  holding  company of
Magnetar Financial and Magnetar Investment Management, LLC, a Delaware limited
liability  company  ("Magnetar  Investment  Management").   Each  of  Magnetar
Financial  and  Magnetar  Investment   Management  are  registered  investment
advisers under Section 203 of the Investment Advisers Act of 1940, as amended.
Magnetar  Financial  serves as investment  adviser to Magnetar  Capital Master
Fund, Ltd, a Cayman Islands exempted company ("Magnetar Capital Master Fund").
In such capacity,  Magnetar  Financial  exercises  voting and investment power
over the Shares held for the account of Magnetar Capital Master Fund. Magnetar
Investment Management serves as investment adviser to the Managed Accounts. In
such capacity,  Magnetar Investment Management exercises voting and investment
power over the Shares held for the accounts of the Managed Accounts. Supernova
Management is the general partner of Magnetar Capital Partners. The manager of
Supernova Management is Mr. Litowitz.

Item 2(b).  Address of Principal Business Office or, if None, Residence:

            The address of the principal  business  office of each of Magnetar
Financial,  Magnetar Capital Partners,  Supernova Management, and Mr. Litowitz
is 1603 Orrington Avenue, 13th Floor, Evanston, Illinois 60201.

Item 2(c).  Citizenship:

            i)    Magnetar Financial is a Delaware limited liability company;

            ii)   Magnetar  Capital  Partners is a Delaware limited partnership;

            iii)  Supernova   Management  is  a  Delaware  limited   liability
company; and

            iv)   Mr. Litowitz is a citizen of the United States of America.



                                                            Page 7 of 11 Pages

Item 2(d).  Title of Class of Securities:

            Class A Common Stock, $0.001 par value per share (the "Shares")

Item 2(e).  CUSIP Number:

            47023A119

Item 3.     If This  Statement  is Filed  Pursuant to  ss.ss.240.13d-1(b)  or
            240.13d-2(b) or (c), Check Whether the Person Filing is a:

            (a) [ ] Broker  or  dealer  registered  under  Section  15 of  the
                    Exchange Act.

            (b) [ ] Bank as defined in Section 3(a)(6) of the Exchange Act.

            (c) [ ] Insurance  company as defined in Section  3(a)(19)  of the
                    Exchange Act.

            (d) [ ] Investment  company  registered  under  Section  8 of  the
                    Investment Company Act.

            (e) [X] An investment  adviser in accordance with Rule 13d-1(b)(1)
                    (ii)(E);

            (f) [ ] An employee  benefit plan or endowment  fund in accordance
                    with Rule 13d-1(b)(1)(ii)(F).

            (g) [ ] A parent  holding  company or control person in accordance
                    with Rule 13d-1(b)(1)(ii)(G).

            (h) [ ] A savings  association as defined in Section 3(b) of the
                    Federal Deposit Insurance Act.

            (i) [ ] A church plan that is excluded  from the  definition of an
                    investment   company   under   Section   3(c)(14)  of  the
                    Investment Company Act.

Item 4.     Ownership:

Item 4(a)   Amount Beneficially Owned:

            As of  February  14,  2008,  each of  Magnetar  Capital  Partners,
Supernova Management and Mr. Litowitz may be deemed to be the beneficial owner
of the  187,500  Shares held for the  account of the  Managed  Accounts.  This
figure includes 187,500 shares that the Reporting Person is entitled to obtain
upon the exercise of warrants to purchase the Shares.

Item 4(b)   Percent of Class:

            The number of Shares of which each of Magnetar  Capital  Partners,
Supernova Management and Mr. Litowitz may be deemed to be the beneficial owner
constitutes  approximately  0.36% of the total  number  of Shares  outstanding
(based upon information  provided by the Issuer in its registration  statement
on Form 10-Q filed on November 21, 2007, there were  approximately  52,602,756
shares outstanding as of November 16, 2007).

Item 4(c)   Number of Shares of which such person has:

Magnetar Financial:
-------------------

(i) Sole power to vote or direct the vote:                                 0

(ii) Shared power to vote or direct the vote:                              0

(iii) Sole power to dispose or direct the disposition of:                  0

(iv) Shared power to dispose or direct the disposition of:                 0


Magnetar Capital Partners, Supernova Management, and Mr. Litowitz:
------------------------------------------------------------------

(i) Sole power to vote or direct the vote:                                 0

(ii) Shared power to vote or direct the vote:                        187,500/1/

(iii) Sole power to dispose or direct the disposition of:                  0

(iv) Shared power to dispose or direct the disposition of:           187,500/1/


----------------
/1/ This figure includes 187,500 Shares that the Reporting Person is entitled
to obtain upon exercise of warrants to purchase the Shares.



Item 5.     Ownership of Five Percent or Less of a Class:

            If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial owner of more
than five percent of the class of securities, check the following [X].



                                                            Page 8 of 11 Pages


Item 6.     Ownership of More than Five Percent on Behalf of Another Person:

            This Item 6 is not applicable.

Item 7.     Identification and Classification of the Subsidiary Which Acquired
            the Security Being Reported on By the Parent Holding Company:

            See disclosure in Item 2 hereof.

Item 8.     Identification and Classification of Members of the Group:
            This Item 8 is not applicable.

Item 9.     Notice of Dissolution of Group:
            This Item 9 is not applicable.

Item 10.    Certification:

            By signing below each of the Reporting  Persons certifies that, to
the best of their knowledge and belief, the securities  referred to above were
not  acquired  and are not  held for the  purpose  of or with  the  effect  of
changing or  influencing  the control of the issuer of the securities and were
not acquired and are not held in connection  with or as a  participant  in any
transaction having that purpose or effect.



                                                            Page 9 of 11 Pages


                                   SIGNATURE

            After  reasonable  inquiry  and to the  best of my  knowledge  and
belief,  I certify that the  information  set forth in this statement is true,
complete and correct.

Date: February 13, 2008              MAGNETAR FINANCIAL LLC

                                     By: Magnetar Capital Partners LP
                                          As Sole Member

                                     By:  /s/ Alec N. Litowitz
                                          ----------------------------------
                                     Name:   Alec N. Litowitz
                                     Title:  Manager of Supernova Management
                                             LLC, as General Partner of
                                             Magnetar Capital Partners LP


Date: February 13, 2008              MAGNETAR CAPITAL PARTNERS LP


                                     By:  /s/ Alec N. Litowitz
                                          ----------------------------------
                                     Name:   Alec N. Litowitz
                                     Title:  Manager of Supernova Management
                                             LLC, as General Partner of
                                             Magnetar Capital Partners LP

Date: February 13, 2008              SUPERNOVA MANAGEMENT LLC


                                     By:  /s/ Alec N. Litowitz
                                          ----------------------------------
                                     Name:   Alec N. Litowitz
                                     Title:  Manager

Date: February 13, 2008              ALEC N. LITOWITZ


                                    /s/ Alec N. Litowitz
                                    ----------------------------------------



                                                           Page 10 of 11 Pages


                                 EXHIBIT INDEX


Ex.                                                                   Page No.
---                                                                   --------

A.    Joint Filing Agreement, dated February 13, 2008 by and among
      Magnetar Financial LLC, Magnetar Capital Partners LP,
      Supernova Management LLC, and Alec N. Litowitz.................       11



                                                           Page 11 of 11 Pages



                                   EXHIBIT A

                            JOINT FILING AGREEMENT

            The  undersigned hereby  agree that the  statement on Schedule 13G
with respect to the Common Stock of Jamba,  Inc. dated as of February 13, 2008
is, and any amendments thereto  (including  amendments on Schedule 13D) signed
by each of the undersigned shall be, filed on behalf of each of us pursuant to
and in accordance  with the  provisions of Rule 13d-1(k)  under the Securities
Exchange Act of 1934, as amended.

Date: February 13, 2008              MAGNETAR FINANCIAL LLC

                                     By: Magnetar Capital Partners LP
                                          As Sole Member

                                     By:  /s/ Alec N. Litowitz
                                          ----------------------------------
                                     Name:   Alec N. Litowitz
                                     Title:  Manager of Supernova Management
                                             LLC, as General Partner of
                                             Magnetar Capital Partners LP



Date: February 13, 2008              MAGNETAR CAPITAL PARTNERS LP


                                     By:  /s/ Alec N. Litowitz
                                          ----------------------------------
                                     Name:   Alec N. Litowitz
                                     Title:  Manager of Supernova Management
                                             LLC, as General Partner of
                                             Magnetar Capital Partners LP

Date: February 13, 2008              SUPERNOVA MANAGEMENT LLC


                                     By:  /s/ Alec N. Litowitz
                                          ----------------------------------
                                     Name:   Alec N. Litowitz
                                     Title:  Manager

Date: February 13, 2008              ALEC N. LITOWITZ


                                    /s/ Alec N. Litowitz
                                    ----------------------------------------