JOINT FILING AGREEMENT
EXHIBIT 99.10
The undersigned acknowledge and agree that the foregoing Amendment No. 1 to Schedule 13D is filed
on behalf of each of the undersigned and that all subsequent amendments to the Schedule 13D may be
filed on behalf of each of the undersigned without the necessity of filing additional joint filing
agreements. The undersigned acknowledge that each shall be responsible for the timely filing of
such amendments, and for the completeness and accuracy of the information concerning him or it
contained herein and therein, but shall not be responsible for the completeness and accuracy of the
information concerning the others, except to the extent that he or it knows or has reason to
believe that such information is inaccurate.
Dated: April 9, 2008
| MAGNETAR INVESTMENT MANAGEMENT, LLC |
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| By: | /s/ Xxxx Xxxxxxxx | |||
| Name: Xxxx Xxxxxxxx | ||||
| Title: Counsel | ||||
| MAGNETAR CAPITAL PARTNERS LP |
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| By: | /s/ Xxxx X. Xxxxxxxx | |||
| Name: | Xxxx X. Xxxxxxxx | |||
| Title: | Manager of Supernova Management LLC, the General Partner of Magnetar Capital Partners LP | |||
| SUPERNOVA MANAGEMENT LLC |
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| By: | /s/ Xxxx X. Xxxxxxxx | |||
| Name: | Xxxx X. Xxxxxxxx | |||
| Title: | Manager | |||
| /s/ Xxxx X. Xxxxxxxx | ||||
| Xxxx X. Xxxxxxxx | ||||
