Internally warmed mice? Dammit! I NEED THAT. My hands are so cold I can't feel them for large parts of the day... Shame I'm too attached to my Razer mice...
What kind of power does that pull from the USB port?
USB 2.0 is only good for 500mA @ 5V iirc.
Personally, I want a mouse that resembles the Star Trek: The Next Generation phaser, complete with lights and sounds to annoy everyone else in the room.