The Pocket Retro Game Emulator from ThinkGeek basically “plays roms from your favorite 8 and 16 bit game consoles — no emulator software to load, just copy over the roms and start playing.” Video after the break.
4GB of internal storage, expandable via mini SD. Beautiful 2.8 inch QVGA (320×240) LCD Screen. Output to TV via included composite video cables. Full media player functions including videos, music, FM radio, e-books and voice recorder.