Pipe Common Stock Placement Agent $15,279,000 March 2011

Follow-on Offering Common Stock Co-Manager $125,120,000 October 2010

Follow-on Offering Common Stock Co-Manager $119,600,000 May 2010

Follow-on Offering Common Stock Co-Manager $57,442,500 January 2010

Registered Direct Common Stock & Warrants Co-Placement Agent $11,772,000 October 2009

Private Placement Preferred Stock and Warrants Placement Agent $2,920,000 September 2009

Registered Direct Common Stock and Warrants Co-Placement Agent $8,250,000 April 2009

Registered Direct Common Stock Placement Agent $4,665,500 August 2008

This is not an offer or solicitation to purchase securities, which can only be done via prospectus.