Thanks.
Unfortunately I had it in a belt case, and didn't notice it until I took it out to send a SMS. Don't know how long it was in that state, probably an hour or more, and the screen was lit and HOT as H*LL, as was the battery. After it cooled down, I turned it back on and it has been working fine (fingers crossed).
Wonder how much "phone life(span)" I've lost as a result of this 'burn'?