I thought I'd be all cutting edge and pick up an MX Revolution when they were on sale last weekend, but after using a Trackman Wheel almost exclusively with my desktop for the last three months, using a mouse hurts! I get twinges along my whole arm when I'm using it that disappear entirely when I use my trackball.
It's a little frustrating, because I'd like to go all-wireless to reduce some of the clutter and cable spaghetti I have going on around my desk. Unfortunately, the wireless Trackman Wheel is simply ancient and I'd rather not deal with the big reciever dongle. Oh Logitech, give me a 2.4GHz version with a micro receiver, please!