Perhaps you noticed that Apple has finally released a multi-button pointing device, the Mighty Mouse. (I assume the trademark issues are all worked out.) Apparently, the next new Mac you get, maybe you won't just throw the mouse away. What a concept.
Being a booster/shareholder/zealot, I got one. It's really quite nice. Soon I'll need another one. Then I can dismiss two Microsoft mice; progress.
Archicad users beware, though. That's you, right? The mouse works fine in AC out of the box. Scroll-zooming is a pleasure, and the horizontal scrolling works in all other apps. The software that comes with the mouse should be avoided. The driver breaks scroll-button-panning in AC. If you haven't recently had the alternate lifestyle experience of broken scroll-button-panning, take it from me, it's hell.
Worse, uninstalling the driver is, as of this writing, not realistic. I had quite a battle to get the mouse behavior back the way it was pre-MM.
So you are warned: Get the mouse, but leave the CD in the box.