I owned the first gen iPad prior to the new iPad "3". Regarding the heating issues some people have or perceive. I do not have ANY heating issues....in fact I just ran two music video for a total of 4 hours and you could not detect any heating, let alone warming of the iPad....anywhere!
I guess if you have one the clearly is getting HOT, I'd run it by Apple and consider a replacement. But sometimes the mere mention of an "issue" by someone brings gobs of people to believe they have this problem....maybe an iPadochondriac condition.
Enjoy this thing....yes there are some units that clearly have a problem and that should be addressed, but don't through it out because it MIGHT have symptom that you weren't even aware of until you heard someone else complain.
Needless to say, I love mine, but would pursue issues if I had a CLEAR, defined problem.....not a potential, based on uncertainty.