(I wouldn't say that system resources is an issue. Traffic between the users and database would be a factor due to constant refreshes to imitate a real-time environment in ASP)
BecauseOfChrist, Download one of the millions of chat applications from the net.
When it comes down to it, this is a forum. Its not a 'real-time' environment and a chat facility is far too abstract from this purpose.
For an effective chat application, you need some type of applet to provide real-time communication. Native ASP can't do this.
Cheers,
Andrew
Edited by Bunce