My MacBook Pro that does get really hot had its battery start to bulge out of the case!

Luckily Apple support is going to send me a new battery. They were not very helpful when I asked about the excessive heat from the laptop. He did tell me that the laptop was not to be put on your "lap" and should be a on a hard surface. I told him that it also gets extremely hot when it is in my bag and sleeping. In response to that he stopped just short of telling me not to put it to sleep. The fact that "it has an Intel chip in it and they get very hot" was also repeated over and over. Ugh.

Now they are getting recalled!! They were very nice when I sent mine back but sure to remind me that they would charge me for my new one if I didn't send it back.