Hi, I'm planning on upgrading from my original 120GB HDD some time in the near future. I've been eyeing the drives for sale from CanadaRAM.com http://www.canadaram.com/2_5_sata_hard_drive.htm I was looking at 500GB at 5400rpm or 320GB at 7200rpm, and then I decided to look on the Seagate site, and they seem to have a 500GB 7200rpm drive that's 9.5mm thick. Did this drive just come out or something, cause it doesn't show up on some of the retailers i've checked out. I'd also be happy to get any sage words of advice from people who've done this upgrade before. I'm pretty good with my hands, but I'd like to know if there's anything in particular to watch out for that might not be covered in some of the online guides. I was also thinking of upgrading to 4GB ram. If my MBP shipped with 2GB, does that mean the easier to access slot next to the battery should be available?