Okay, I'm hearing about this whole signing up whatever for your iPhone 3GS to be able to downgrade, or jailbreak or whatever. I have NO IDEA about this all, I went on Saurik's site and read his long essay, and I am left clueless. Can someone briefly explain to me about this whole signing up business? I'm on 3.1, by the way, I got it like that. I seriously have no idea on what's going on.