I got my iphone yesterday, and was so thrilled. It is the most amazing phone I have ever touched (was using sucky Treo 650). The edge in Chicago is pretty fast, way faster than on my treo. Anyways... I started out the day fully charged, and did some light surfing (maybe 10 minutes) demoed a movie for a few minutes, and was listening to the ipod for maybe a total of 30minutes. Around 7 o'clock my phone just cuts out while I was listening to music, and I had a half battery charge left. The phone wouldn't turn on again after that. So today I took it the Apple store, and the genius is like I've never seen this, after he had in the dock for 20 minutes, it finally fired back up, but we both agreed it would be better if I got a new one, because the battery should have lasted way longer. They replaced it, and I'm back in business.