Finally! Since the dawn of floating apps (which was like, what, three months ago?) this is the one that I've hoped for: a chat client! Brought to us by the Tablified dev team, LilyPad HD finally makes it possible to rid yourself of the full-screen chat client on your tablet for something far more practical.
Like other floating apps, LilyPad offers basic features needed for an always-on-top app, like quick-hide mode, resizable windows, and even tabs for chatting with multiple people without having a slew of small windows taking over the entire screen.
At the current time, the app costs $1.49 and only has support for Google Talk.