I have a 2.8GHZ MacBook Pro that is about a year old, with 4GB Ram. When I upgraded it to 10.7.1, it really became fairly sluggish. Lots of spinning beach balls. Apps take quite awhile to launch. Just double clicking on a very small screen capture on the desktop can take 10-15 seconds to launch Preview. That should really be instant. Same with small text files opening in TextEdit. I upgraded the internal HD to a 1TB 5400 RPM drive, but the performance was so bad I swapped that to a Scorpio 750GB 7200 RPM drive. Much better, but my little Air with SSD is 3 times as fast as this thing! Wondering if there is some housecleaning that I am forgetting about? I reboot about once every 3 days when thing degenerate to ridiculous speeds, and that helps, but not enough. Any input?