I now have 1Gb of RAM in my Powerbook and it’s much faster. Before, when I ran ‘top‘ it would show only 5 or 6M of free ram, and it would be painfully slow from all of the swapping. Now I see at least 500M free with no disk swapping. I now see only one swapfile in /var/vm; with 512M I would see 6 or 7 after running for a while with several applications open.