Word of note, I got a spinning beachball after the 10. 4. 6 update. So I reran "delocalizer". Pulls another gb of space off my hard drive AFTER the update. Don't ask me why. Now, and after a fresh round of MacJanitor, the machine does feel speeeedy.
I'm talking about both my powerbook 12" 1.5ghz 1.25gb ram and my Tibook 550mhz 60gig 7200rpm hd 1gb ram.