I just called a local Apple store and talked to the store manager. They confirmed the release date being set for 6/29 (no surprise here) and also stated that the iPhone purchased through Apple will include a SIM card and a phone number to activate the iPhone over the phone with AT&T. Apple stores will not be handling any activations. For current AT&T customers, it will be simply mean transferring your SIM from your old phone to your new shiny toy. She admitted that she is not 100% sure on this yet, but this is what she knows so far from what she has been told and what is happening.