nPod
Ben heck has done it again with another NES miniturized... 'Made from one of those wonderful "NES on a chip" joystick things, the nPod is my latest addition to my portable resume. It's barely bigger than the cartridge, thinner than my NES Micro and has a 3.5" screen, whereas the Micro was 2.5" Like the Micro it runs off (4) AA batteries.'
http://benheck.com/Games/Nintendo_projects/nPod/nPod_1.htm