AT&T's free Starbucks Wi-Fi for iPhone usersdeal didn't last very long. Users on the MacRumors forum say that locations where Wi-Fi worked just days ago now have the free iPhone access removed. Considering AT&T never made an official mention of the service, it's possible somebody at the Death Star jumped the gun and the mistake has been corrected. Or maybe the company found out that a simple hack would let anybody with a friend's iPhone number get a free ride