Desktop Monitoring

Is anyone doing any kind of monitoring of Desktop Clients

with Xymon? 

 
I'm using the Windows Client to monitor the Windows Servers,

but I'm thinking of monitoring desktop clients at remote sites.

 
We get users complaining that their desktops are slowing accessing

our Web Based Applications. (This is a dedicated business with remote

offices and several thousand users).

 
We want to try and track their desktops and what's happening with them.

 
Any suggestions?

 
Thanks.James