I made a chatroom for Lamma years ago. It is here and you can use it anytime you like.
http://network54.com/Hide/Chat/34644
However Yahoo messenger is much better to use for chat as it has video/voice capabilities and other stuff.
It is free. You can get it here:
http://messenger.yahoo.com/
Anytime you see a Yahoo messenger logo under someones forum name you can click it to chat to them if they are on line.
It looks like this
You can add your Yahoo messenger ID in your
profile section. (see header links above)
If more than two people are chatting you can use conference mode or keep the chats seperate.
It is very good and I think it is better than ICQ, MSN etc. Also saves a lot of money in overseas phone calls.