6
it will cost you $5 from this guy but this one is a pretty cool chat, multiple rooms, user created rooms, opening closing chat times, private chat messages, works in flash, and is intergrated into xoops.
Admin
+ boot user from room
+ boot user from all rooms
+ ban user ip (bans for X amount of time
Requires minor script editing to change some settings but full chat is documented so it's pretty damn easy to do.
Hope this is of help.