I just received the one in this link
http://www.gyration.com/go24airmouse.htm
it works much better than i ever thought...it's an optical mouse AND an in air mouse (essentially you just move your wrist while holding it in the air and the mouse moves to your movement)...i was skeptical about the in air part...but actually works very well...haven't played online with it...just tested it real quickly...but you can do easy click/drag motions...so far the slickest mouse i've seen yet...a bit pricey but as of right now it gets two thumbs up...