At idle my 15 inch 2.53 GHz MacBook Pro is running between 60°C and 70°C. The issue has been going on since I got the unit, but recently, I would let it for hours, with all user processes terminated through activity monitor. The sleep indicator would be solid and not pulsating. When I do go into iStat, at complete idle, the system and user processes read zero, but alternate between 0% and 10% even though virtually nothing would be running. The fans are blaring constantly and the casing is scolding hot. All of this persists after completely formatting my drive and reinstalling Snow Leopard. I'm not sure what the issue could possibly be. Any insight would be great.