lobsterghost1 - Thanks, that's actually helpful. It's been a little hard to tell in some of this discussion whether the people saying that they're not having any issues are really having no issues or simply have a higher tolerance for issues! So having someone state directly that they're not experiencing any heat in situations where I am helps to know that there definitely are phones out there without the issue, because that means that swapping for another one is at least worth trying.
As for swapping to the other phone... I'm not going to go ripping it open right now, but rather than just returning it, I am going to ask them if it's ok for me open it and try it.
mickeytheking - Yeah, biggest reason that I'm concerned is that I could actually be potentially making two open returns if the second phone has the same problem. So I'm just going to check with them first to make sure I won't run into any issues with that.