My Macbook Pro is very slow whenever I do several things at once (Unibody 15", 2.4ghz, 2gb ram). It seems that my harddrive is slowing things down enormously. So when I am downloading a file, browsing the net and watching a clip at the same time, everything gets all stuttery. Even scrolling in safary stutters like hell, loading a small (like 30mb) avi file in VLC can take several minutes, beach ball every five seconds. Strange thing is, I don't even seem to need to do a lot to get this behavious. Sometimes, even just browsing and scrolling turn things to a crawl. This is on a freshly formatted 500gb 5400rpm drive I took from my external drive (Lacie). Snow Leopard.