A friend of mine sent me this link yesterday about an iPod running Linux which, in turn, can now run MAME. I've run iPodLinux on an older iPod for fun, but not one with a color screen worthy of MAME. I suspect my wife would spaz if I did this to her iPod Nano.
Yesterday evening, though, I came across an even more amusing link: an iPod Nano MAME Arcade. This has to be one of the most amusing and creative things I've seen recently.