According to Interrupting Moss from Somethingawful, here, it takes a slight misapplication of thermal grease on a MacBook Pro to make the temperatures skyrocket. When he took the back off his MacBook Pro he found that was just what the assembly teams at Apple had done.
On the forums he shows before and after pictures and measures the temperature gauges to prove it. He scrapped off Apple's attempt at thermal greasing and reapplied the paste correctly. Now his laptop does not get as hot as it used too.
Moss said that most people think that their new Apple's are supposed to get a bit warm, but there was no way they needed to get THAT warm.
What makes matters worse is that Apple's tech teams would not think that there was a problem, so taking it into the shop for repairing would not make it go away.
Maybe instead of dubbing the machines as 'bitchin', Jobs would have been better off saying they were 'smoking' instead. ยต