After going through many of the threads concerning unlocking the iphone, I still have a couple of questions before I make the plunge in getting an ipphone. a. Is it possible to hack/unlock the iphone if you are running your mac on a ppc. Can I just unlock it by going to jailbreak? Or do I need to an installer on my desktop that is for intel b. When you get the iphone from the mac store, do you have to sign a contract first, and then cancel once you have unlocked the phone? c. And What is the best unlocking method available?