EX-2 3 a08-26448_2ex2.htm EX-2

EXHIBIT 2

 

JOINT FILING AGREEMENT

 

The undersigned hereby agree to the joint filing of the Amendment No. 1 to Schedule 13D to which this Agreement is attached.

 

Dated:  October 20, 2008

 

 

DISCOVERY GROUP I, LLC

 

 

 

 

 

 

 

By

Michael R. Murphy*

 

 

Michael R. Murphy

 

 

Managing Member

 

 

 

 

 

 

 

Daniel J. Donoghue*

 

Daniel J. Donoghue

 

 

 

 

 

 

 

Michael R. Murphy*

 

Michael R. Murphy

 

 

 

 

 

 

 

*By:

/s/ Mark Buckley

 

 

Mark Buckley

 

 

Attorney-in-Fact for Daniel J. Donoghue

 

 

Attorney-in-Fact for Michael R. Murphy