Just a quick note. I know some of you might be thinking of updating your hard drive on the Macbook Aluminum, and you might be worried the new drive will make things worse on the noise and heat front. Anyhow, I wanted to say that I just installed the Seagate Momentus 5400 speed, 500 GB, and I would say that my 2.4 ghz MB is running a bit cooler and probably a bit quieter as well. I would personally avoid the 7200 drive since it will generate more heat. The HD is what generates all the heat in the left corner of the laptop. So be careful. The stock drive I removed was a Toshiba 250 gb, and I compared the specs to the Seagate and the new drive definitely has a longer life rating among other things. The drive was pretty cheap. It was a simple process that took about 2 hours to pull off the cloning part. The only tiny complication is that there are these little screws that you have to remove from the old drive. You will need a good pair of needle nose pliers to get them off, or a very small allen key. 1/2 a terra byte! Sweet.