MAME & Z-Machine apps for the iPhone, these involve the usual amount hackery to get them going, but very cool!
As expected, performance is an issue. For example, Pacman and Q*bert run quite well, but Galaga and Gyruss are marginal even with frame skipping and lowered sound quality. The SDL port was the quickest way to get everything up and running without having to delve into the guts of MAME. I’ll take a stab at slapping together something based on a really old, simpler version of MAME to see if it runs any better.
Frotz Z-Machine Interpreter for iPhone – Link.