R4 DS

[Mockery]

I own an R4DS and is absolutely rules. Easily the best purchase I've made for my Nintendo DS. I have NES, Super NES and Sega Genesis emulators running on it, but even more importantly, I have my copies of The Secret of Monkey Island and Indiana Jones classic adventure games running on it (they're perfectly suited for using the touchscreen pen tool - Sierra and LucasArts should really consider releasing DS versions of their classics).

If you own a DS and you can find the R4DS at a decent price, do yourself a favor and buy it.