Here is a port of MAME for the ipod. Note that this will only work on the 5G ipod, unless you put another LCD driver in, so feel free to do so. I WILL NO PROVIDE SUPPORT FOR THIS. If you can't figure it out, you're on your own. I wrote this becuase I wanted to play pacman on my 5G, so it worked out.
very very cool.
for those of you who dont know what MAME is, it's a well established free video game emulator that can emulate thousands of classic arcade and console video games. really one of the gems of software development that helped usher in the era of emulators: http://www.mame.net/