I upgraded to 3.1 the minute it came out yesterday. Everything seemed awesome. Woke up for class this morning and it still looked good. At some point between when I got back from class and now my iPhone stopped working. It feels warm, but when I hit the sleep or home button, no lock screen comes up. The LCD seems dead. Flicking the silent switch doesn't do anything either, usually it vibrates. I tried plugging into my mac book to charge / sync but it remains inactive. Is there a process 3.1 put on the phone that may of run the battery completely dry? Is this just a coincidence that my hardware randomly died after 3.1? Or, [fearof3.1] did 3.1 really KILL my iPhone?!?! [/fearof3.1] Any suggestions on what I can do to fix this before I schedule an appointment with a genuis?