Mine doesn't and I got it a month ago. Obviously they're now correctly applying the thermal grease. I had an older one that was replaced that did have some heat and whine problems. Neither computer ever had any problems with Bluetooth or Airport.
If you want one, get it, I would say that chances are low that you'd have problems at this point. And if you do, there are enough people who have problems to rally around Apple and get all of them fixed in the future.