The Microsoft Wireless Notebook Optical Mouse is a standard USB mouse that has been on the market for several years now. I originally bought it when I bought a notebook, as I was tired of dealing with the wires.
This is, overall, a very good product. The most attractive feature of this mouse is the battery life. It uses a single AA battery, and I have gone months without needing to change the battery. It also has fairly good response time, although there does seem to be a tiny bit of lag when playing some fast-paced computer games, if you're interested in that.
The biggest drawback to this mouse is its size. It is only about 2/3 the size of a normal mouse. This was obviously meant to enhance portability, but if you have large hands like me, it might become a bit uncomfortable after extended use. Overall, however, I would recommend this to anyone looking to eliminate wire clutter with a relatively cheap mouse.