I took mine in to have it replaced a week ago because of the overall quality of the phone....battery, heat, creakiness when typing, etc.....
I picked my new one up yesterday and all of those problems are gone....ran music and video for 2 hours with no heat issue and the battery is very close to the Mogul battery life now.....and no creaking when typing...(I should not have to put a piece of tape in the back to stop this) .....the over all quality just feels much much better....(the previous one had a feeling of overall being loose like)...oh and I almost forgot the camera going black were I could not preview pics I was taking....so far that issue is gone also....
I believe that they were back ordered to take care of these issues....the build date is 11/24/08....I am more than happy now with my new TP...