Oh boy.. remember when Google App Engine launched with a demo (and free) app resembling Campfire? 37signals cried foul until Google took it offline. Let's hope 37s doesn't hear about this one..
To their defense, that demo did look very much like a clone of Campfire.
It was a freaking chat room!
It was a note for note cover of the 37Signals UI that was clearly designed to evoke Campfire, done by Google. What's the web chat room designed prior to Campfire that looks virtually identical to Campfire?
Every chatroom looks the same. It's like moaning that email clients steal UI from each other. Of course they do.