http://itunes.apple.com/us/app/metal-gear-solid-touch-us/id307338306?mt=8 Well that's the official Metal Gear Solid game on the iPhone, but it's not the same as the console version. If you mean a game that acts like Metal Gear in term of the Tactical Espionage Action, no, I don't think so.
Yep, that's about the only thing that's even close. But if you really want a good mgs game, go buy a psp.