The Samsung EPIC 4G.
Root, custom kernel, load CM7 and MIUI ROM.
Overclock Hummingbird cpu to 1.5GHz and the SGX540 gpu to 300Mhz, increase free RAM to 340MB.
Slap on a GameGripper and enjoy ~fullspeed emulation of atari/classics, sega, nes, snes, gbc, gba, psx, n64, dosbox-depending (and...