I have a friend at work making one right now, and if I do say so myself his is even more impressive than that one. Not just does it have better overall specs, but the CD player that is in it is capped with the end of a Super Mario Brothers / Duck Hunt cartridge and the controllers can be plugged directly into it to work with emulation.

He also really wanted to make it so that it looked original. There are no extra holes drilled into it for nearly anything -- it has a wireless keyboard, wireless mouse, wireless internet... The only thing that looks different is where the VGA cable comes out. It's rather amazing.

It's quite the project and he's still got a ways to go, so things could change... but its pretty slick looking right now!