Terminal Services - Remote Desktop and Access

To all,

I am running an Access application with a SQL backend on a remote server
running Win 2003 Server. The users are using Remote Desktop with Terminal
Services as host.

We have about 5 or 6 users connected concurrently at any one time. So far,
this has been a marvelous setup, with performance being excellect 98% of the
time.

My question is, how many concurrent users can the Remote Desktop/ Terminal
Services connection method support comfortably?

Thanks,
Bill