Wolfenstein released for iPhone, Doom on the way
John Carmack's put out an open source version of the original Wolfenstein for iPhone, as you can see in this ludicrously detailed document on VE3D.
DOOM's on the way as well, said the developer.
"I'm going back to Rage for a while, but I do expect Classic Doom to come fairly soon for the iPhone," he said at the bottom of his notes.