I use a
Nostromo n50 and a Logitech Trackman (well, an
M570 now, but really I don't care if it's corded.)
If they made a cordless Nostromo, I'd be on it in a flash. Heck, if they made a Bluetooth trackball, I'd be on that, too.
-Crissa
Note: The M570 needed to be greased with graphite out of the box, which was kinda odd. But it works fine now.