“You wouldn’t think DOOM would be a possible (or even thought of for that matter) on Apple’s iPod, but the folks at iPod Linux have accomplished just that by working together,” Patrick Klepek reports for Computer Gaming World.
“The iPod port of DOOM works best on the expensive line of iPod Photos [sic] players, but the website stresses it only ‘sort of’ functions on first to fourth generation iPods and first and second generation iPod Minis,” Klepek reports.
Full article with images and links here.
The Linux on iPod DOOM page also includes QuickTime movies of the game in action on an iPod.
Note: Apple no longer sells “iPod photo” players. All Apple iPods (20GB or 60GB) now include the former “iPod photo” line’s features: http://www.apple.com/ipod/color/