Thanks!
I have thought to bring it down to the apple store to have them blow the dust out. I wouldn't do that myself I don't have the means to do it correctly.
Have you tried opening it up and blowing the dust out of it!! Did this with a friends of mine and it solved his 'fan always on' problem! These things can get full of dust which acts as a very good insulator and making the temperature sore even with no use on the processor resulting the fans staying on!!
I have thought to bring it down to the apple store to have them blow the dust out. I wouldn't do that myself I don't have the means to do it correctly.