I need a good cgi or java chat room script

Does anyone know of any good internet chat scripts I could use on a remote server(barrysworld.com servers)?
I'm using bravenet.com's but wayy to many ads and it looks like crap.
It needs to be very basic, not flashy, and w/ few ads. Most important, the login needs to be customizable(a basic applet or javascript would be nice).

Can you get free IRC hosting anywhere, how hard is it to host one yourself?

You might wanna post this in Programming Tips and Tricks to see if that gets you any more responses.

k, ill do that now, thanx