My Logitech MX500 mouse is the best mouse I've ever used. It's got a very nice shape and plenty of buttons that I use for Expose, cmd-m, pgup, pgdn. The only problem is the crappy OS X support in Logitech's drivers. :mad: Apple's mouse acceleration curve in OS X is really horrible too... I'm always wishing for XP-like smooth, natural mouse movement.

Logitech's new bluetooth MX900 mouse is great (I'm using it right now on my powerbook), the only problem is that it doesn't have drivers for Mac as of yet, so I can't customize any of the buttons. Left-click, right-click, and scroll wheel work just fine for their usual functions. It's really too bad that Apple won't give up on their one button design. They really have the best mice out there of any I've seen.