I know there's probably a simple answer to this, just can't find it (tried google too)...

How do I tell how many users are concurrently logged on to a Zope server? I'd like to be able to store/show statistics.

This has been asked quite a few times on the mailing list. Please search the mailing list archive. The short version: HTTP is a _stateless_ protocol and there is no way of telling how many people are "logged in". You can "fake out" state by using the built-in sessioning. jens