I don't generally go in for ultra-fancy mice. After all, even the most advanced models won't let me do the one thing I demand from the peripheral: let me control the cursor with my butt. Thankfully, the design pioneers at Interaction Architecture have created the Backball, which lets you do just that.

The big orange ball doubles as a giant trackball. According to Engadget, the thing is designed for use in places like airport--apparently butt-controlled computers are more appropriate in public spaces.

Honestly, I think that's the sort of thing people ought to save for the privacy of their own home.