Just started happening and it seems to be getting worse. I have a 17" unibody macbook pro with 8GB ram and a 500GB HD. There is plenty of ram left and the cpu is only being used in small chunks by firefox so I'm guessing something is wrong with my harddrive. The system is up to date and it does not appear to be any single app, Adium is slow and freezes, vmware fusion wont really start or if it does it locks up. I tried running TechTool Pro but even that is painfully slow and has a constant beach ball. I was able to run the SMART check and it passed...any ideas?