[JoelBennett]

It getting hot just sitting there would be more a sign of some background process that is running the CPU at full tilt. I've had the same thing happen to a Blackberry and a Nokia Windows Phone.

Either way, it's a crummy situation to deal with. Sometimes rebooting helps.

[dasboth]

Yeah when I notice it getting hot I usually reboot to kill any background processes. Typically what happens is I put it away and pick it up half an hour later only to see that it's dropped like 10% battery. My next smartphone purchase will be almost entirely based on battery life.