In the beginning, there was one button. Then there were two. Then there were clickable scroll wheels and programmable toggles and solid-state slides. But nobody made a mouse as easy to use as your Mac. Until now. Mighty Mouse combines the capability of a multibutton mouse with Apple’s signature top-shell design for the best of both form and function. Use it any way you work: Stick with single-button simplicity or click with multibutton efficiency.I am not making this up.
The scrolly trackball thing looks kind of nifty, though it's not unprecedented. I'm curious to try one and see how it handles.