JOINT FILING AGREEMENT
EXHIBIT 99.1
The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on
behalf of each of the undersigned and that all subsequent amendments to this statement on 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: February 14, 2008
| MAGNETAR FINANCIAL LLC By: Magnetar Capital Partners LP, its Sole Member |
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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 |
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| 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 |
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| 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 | ||||
