I tried it out on my ipod touch 4 the other night. I am disappointed really.
It crashes because of apples memory issues. (if an app is taking too much memory ios will close it regardless of whether it can run or not) So even though I was able to get to the safe house it crashed as soon as I was about to save my game. its only playable for me with the top-down view camera. hopefully rockstar will fix this issue, because its unplayable. I guess I'll just go back to playing on my psp... but I want the 3 storyline..

I still haven't beaten gta 3 :P