<PAGE> 1
EXHIBIT A
to SCHEDULE 13D
JOINT FILING AGREEMENT
We, the signatories of the statement to which this Joint Filing
Agreement is attached, hereby agree that such statement is filed, and any
amendments thereto filed by any or all of us will be filed on behalf of
each of us.
Dated: January 8, 2001
WEISS, PECK & GREER, LLC
By: /s/ Benjamin J. Taylor
-----------------------------
Name: Benjamin J. Taylor
Title: Managing Director
WPG SOFTWARE FUND, L.P
By: WEISS, PECK & GREER, LLC
its General Partner
By: /s/ Benjamin J. Taylor
-----------------------------
Name: Benjamin J. Taylor
Title: Managing Director
WPG RAYTHEON SOFTWARE FUND, L.P
By: WEISS, PECK & GREER, LLC
its General Partner
By: /s/ Benjamin J. Taylor
-----------------------------
Name: Benjamin J. Taylor
Title: Managing Director
WPG INSTITUTIONAL SOFTWARE FUND, L.P
By: WEISS, PECK & GREER, LLC
its General Partner
By: /s/ Benjamin J. Taylor
-----------------------------
Name: Benjamin J. Taylor
Title: Managing Director
BENJAMIN J. TAYLOR
By: /s/ Benjamin J. Taylor
-----------------------------
Name: Benjamin J. Taylor