Okay, so this is really weird. I was at Starbucks this morning, using the AT&T WiFi, and then, after I was finished using my phone, I put it in my pocket. As I was going to leave, I went to hit the sleep/wake button to check the time, and it wouldn't turn on. I tried reseting it, holding down the sleep/wake and home button, and I tried moving the silent/ringer switch to see if the phone was on (because when i move the switch to silent it vibrates--which didn't happen this time), and it was off. I can't get it to turn on. It was fully charged, it was charging all night on AC power, and I connected it to my computer and AC power with two different charging cables. I'm wondering what the issue could be? I've looked on Apple's support pages and couldn't find anything and I've never heard of anything like this happening. I'm trying to avoid going into an Apple Store today because of the huge amounts of people shopping, so can anyone give me some guidance on how to fix this? (By the way, it's a 16GB Black iPhone 3G, if that makes a difference) Thanks in advance.