Most of us who are on hosted servers are not allowed to install chatrooms to our websites because of server load... I´d be more inclined to including a chat that does not take server load from the site we are in at.
JPilot looks like an interesting thing to me, uses irc servers (not installed on yours), maybe if you get the username into it, it could become a cool addon.
Mateo Byler
CruceDeCaminos.com