My mom got an iPhone 3GS on May 9th which falls within the May 7-14 return window to get an iPhone 4. She tried going in on Thursday and the store told her their system was down and to try back again, but May 21st is the cut off to put in a preorder for the extended return. Any idea if the system is back up or what can be done? This may be the case, the system is down, but it seems like a cop out too.