The Evoluent mouse that somebody recommended a week or two back finally arrived. The principle behind the thing is that if you mouse with a regular mouse the bones in your forearm are rotated to full extension, stressing the arm. This mouse is worked from a “handshake” position, so that the arm is in a more relaxed position.
It feels great.
It also has nifty programmable buttons, and an uber-cool “speed toggle.” I configured it so that when I smack CTRL-Windows and it toggles between ultra slow and fairly zippy, allowing me to switch between detail work in one spot, and grabbing a tool on the 2nd monitor without having to pick the mouse up.
It also doesn’t need to be picked up. Because of the way it’s laid out you can just tip it to the side and scoot it in order to reposition it on the mouse-pad.
I’ve had it for a day and I love it enough to recommend it.