The down side of a touchpad is that without it protruding from the surface of the mouse, the it couldn't also function as button as scrollwheels do. A two-button mouse with a scrollwheel that is also a third button would be very nice for X windowing systems. I traded in my blueberry keyboard and hockey puck for the Pro Keyboard and Mouse (well, not quite--I still have to get a power button for my rev. D iMac; the on-computer one doesn't do anything!) and love them, but I've also been looking for a two-button/scrollwheel+button mouse for XDarwin. I think that maybe a Sun Microsystems or SGI unit would be best, but I haven't gotten around to looking at what they've got to offer.
% man woman
man: no entry for woman in the manual.