XBOX 360 Overheating

My Xbox 360 is broken! My fear of my 360 overheating unfortunately came true. It all started with my Xbox locking up a couple times last month and then last week it happened every time I turned it on. I called Microsoft and they said it was still under warranty and sent out a box for me to ship it in. I just received an email from them stating that I should be getting it back on Friday just in time for the weekend. Hopefully this doesn't happen again, but if it does at least Microsoft is good and quick about fixing it.