Kotaku.com provides this "official" Confirmation from Konami, including a hint as to what the controls will be like. I'm just happy it's not a, 'shake iPhone violently to hide, stop shaking to run forward' type of game. This has certainly got my interest piqued.
Rumor has it on that thread that the game will be only point and shoot; Snake will choose when to move and stay put. I sure hope not. The whole point of the MGS series has been how good you are at stealth tactics, right? It would be nice if they had multiple control schemes like BIA so everyone can have what suits them best. It's really all about controls when translating a game like this to the iPhone platform. That's everyone's number one concern about the iPhone and I really think someone is gonna get it right soon and prove all the naysayers wrong.