Pretty impressive. PocketPC emulators have gone a long way as well (fullspeed NES, GB, and nearly SNES, and quite strangely, pretty good PSX). I wouldn't have expected to see a GB emulator on the iPOD.
Yeah that's nice to know but i don't think it works on the newest ipod... cause that's what i have. but then again that probably wasn't out when they wrote that page