Logitech - M315 Compact Wireless Optical Mouse - $12.99 + FS at Best Buy

I just picked one up in store. It works well on my light colored upholstered couch from 20 feet away (with the receiver plugged in the back of an Antec 300), but it doesn't work at all on my dark wash jeans. A plus is it feels much more responsive than my trusty old TrackMan Wheel (circa 2004). It is a little small compared to the Trackball style I've been using, but I can adjust.

I should be getting my solar keyboard in this week, and then I will be able to start playing Skyrim on my TV from the comfort of my living room couch. If I'm going to lose part of my life to a game, I might as well be comfortable. Thanks chuck4rooke!

EDIT: It will work on my jeans, it just won't work if I'm sitting 20 feet away directly in front of the computer. That is with the entire length of the computer between me and the receiver. It works fine at an angle. I may have to move the receiver to the front of the case if this becomes problematic, but so far, this just eliminates one position in the living room.