Can we say "Hell fricking no!", kids? I think we can!
A) I'll never use Java to chat.
B) The tsx.org link puts you into popup window hell. And they're the evil popup windows that don't just spawn new ones when you close, but they remove their own title bars and menus so you can't close them without using Alt-F4, and since you don't know if you're going to get a new popup from it, you end up closing too many windows.