A native NES emulator for the iPhone, currently using the InfoNES core. Video of the emulator in action can be viewed at http://youtube.com/watch?v=LVh429Dp7r0
My first version can be downloaded from code.google
NerveGas has a fast version (with a busted palette) at iphone.natetrue (His source will be rolled into SVN soon)
Presently there is no sound, and the emulator is a little slow (most likely due to the way I’m drawing onto the screen). And the control is a bit iffy (using an image of an actual controller, while cute, sucks).
check it out here code.google