I'm wondering, in case the new iPod Touch being released doesn't seem feature packed enough, can I use an iPhone 3GS without the contract? If I bought one used or however, could I just not activate it with AT&T and essentially it would become a iPod Touch? If I could, does the WiFi still work like the Touch? Can I still buy an Applecare for it and take it to the Apple Store for repairs? I'm assuming of course I can't walk into an AT&T store and buy a 16GB 3GS off the rack and walk out without a contract?