JOINT FILING UNDERTAKING
The undersigned, being duly authorized thereunto, hereby execute this agreement
as an exhibit to this Amendment to Schedule 13D to evidence the agreement of
the below-named parties, in accordance with rules promulgated pursuant to the
Securities Exchange Act of 1934, to file this Amendment to Schedule 13D and
any subsequent amendment jointly on behalf of each of such parties.
DATED: January 30, 2004.
H&Q LONDON VENTURES
By: /s/ Xxxxxx X. Xxxxxxxxxxxx
Xxxxxx X. Xxxxxxxxxxxx
Attorney-in-Fact
H&Q VENTURES IV
By: /s/ Xxxxxx X. Xxxxxxxxxxxx
Xxxxxx X. Xxxxxxxxxxxx
Attorney-in-Fact
XXXXXXXX
By: /s/ Xxxxxx X. Xxxxxxxxxxxx
Xxxxxx X. Xxxxxxxxxxxx
Attorney-in-Fact
XXXXXXXXX & XXXXX CALIFORNIA
By:/s/ Xxxxxx X. Xxxxxxxxxx
Xxxxxx X. Xxxxxxxxxx
General Counsel
XXXXXXXXX & XXXXX VENTURE PARTNERS
By:/s/ Xxxxxx X. Xxxxxxxxxxxx
Xxxxxx X. Xxxxxxxxxxxx
Attorney-in-Fact
H&Q VENTURE PARTNERS LLC
By: /s/ Xxxxxxx X. Xxxxxxxxxxx
Xxxxxxx X. Xxxxxxxxxxx
Member Manager
