[Boofo]

I sent in a ticket last night to ask them about that, and this is the reply I got a little while ago:

There is a maximum concurrent database connections limit. This is set to 25 database connections simultaneously per database username. This means each database username you use can have a maximum of 25 connections at one time. This does not directly relate to the amount of users you can have online at once on your site, since queries open and close in fractions of a second usually, so connections don't typically overlap or build up to 25 unless under very heavy traffic or if queries are taking an unusual amount of time to execute.

I would look at the vsa_chatbox hack, I think.

Looks like I might be looking for another host.