I need to step out of the "where's my iPhone" thread for a second!! In their press announcement about tomorrow's launch, at&t says that if you are inheriting an old iPhone 3G, you need to come to the store to activate it. Why? Why can't I just put the SIM from the phone it's replacing in, call CS and have them add the iPhone 3G data plan, and move on with my life? Am I missing something?