I've had it 2 years in december. I've noticed the fans go on a lot more than before when watching videos/streaming things. I'm assuming there is a ton of gunk inside of it as well. I might as well open her up and clean it up right? I'm also contemplating a new HDD as mine has been full forever. either a 7200rpm 320 or one of the new 5400rpm 500's. I would take out my superdrive as well to put in 2 hdd's but that kit is stupid expensive for what it is. On a side note can i just pop in the new hdd, put in leopard and install?