I use a Logitech Anywhere MX mouse.
Pros: Dark Field technology lets you mouse on any surface - this was the #1 reason I purchased this mouse. There's a desk with a piece of glass on top at the he satellite office I work out once in awhile - previously I was using a piece of paper to mouse on, but said F it and picked up this mouse.
Cons: The mouse requires the use of a very small USB dongle (stays plugged in 24/7, no need to unplug it because it's so small). The con here being it uses up one of the two USB ports (WTF Apple, 2 USB ports on a ****ing PROFESSIONAL notebook, really?).
Overall, I'm satisfied with the mouse. Haven't used it for any FPS games yet, but otherwise is seems to track fine. Had I had seen this thread first, I probably woulda picked up the Razer Orochi though. 😛
You kids out there with the Razer Orochi, does it work on glass or other typical no-mousing surfaces (magazines, books, etc)?