
I have no idea whether or not it would work with what the RPC is moving to, but AJAX chat is something I've used on another site for awhile. You log in to use it and they're pretty active on keeping it updated and squashing bugs. I know one of the guys who works on it -- he's always trying new things out and working on improvements (though he recently got a new job so I dunno if that's eating up more of his time).
But yeahhh, it's by far the best forum chat thing I've ever used.
But yeahhh, it's by far the best forum chat thing I've ever used.