This same thing JUST happened to me, however, I wasn't even using my phone. It's 5am, and I just woke up. I picked up my phone to check something and it was hot, now it won't come on. I took the battery out for a few mins and put it back in, nothing. I plugged it in, the "charging" light comes on, but it still won't come on. So I let it sit for a few mins to let it build up a charge, but it still won't come on. So I grabbed my other droid (which I had to replace due to water damage, but the battery was fine) and tried that battery... same thing.... what the heck happened? I haven't rooted it or anything, I wasn't even using it when it happened. What sucks even more about this is, I had to buy this phone off of ebay (from a very good seller) to replace my original one since I didn't have insurance. I've only had this phone about 2 months. This really sucks because I use my phone for EVERYTHING.