MacMod: SE3000

Here's a guy that took the plastic shell of Mac SE 30 and stuffed a 3.0Ghz PC inside. It's got four USB 2.0 ports, three firewire ports, a serial port, and a parallel port. It can even drive an Apple Cinema Display.

That's a pretty nice gaming machine all inside a tiny little case. I have to say I'm impressed, despite the fact that it's running Windows. There are more pictures at his site, along with some notes on his assembly method.