Today my iPhone (1st gen) decided to act up. I was listening to a podcast when the sound went out and the screen went white. I was able to turn it off, but not back on. It started getting very warm at that point, like it was still working away on something. It's since cooled down, but now is totally unresponsive. There was plenty of battery at the time this happened. Now, it won't power on, whether plugged into my Powerbook or not. Warranty period is over according to Apple, though I evidently still have some form of phone service available. Am I hosed?