FOR THOSE WITH BATTERY PROBLEMS
For me, I think I've solved it...
Go into your Corporate Email, hit the menu button, go to settings. Turn off "Push" notifications and set it to anything other than push. I set mine to 15minutes and my battery was almost instantly relieved. From 8am until 1130am, I lost 85% of my battery. I turned off Push and set it to 15minutes, within a few minutes, the heating issue was pretty much gone, on the back of the phone, and that 15% has lasted me for 2 hours. I'm going to let it die all the way down and charge it up to confirm.
Functionally, this seems to be a major problem right now. I have exchange email at work that always worked fine... but it seems like it was killing battery completely.
Try that... so far, it seems to be working for me.
I'll try it, thanks!