I just got back from CircuitCity with this mouse a few hours ago and I could tell right away that this was the coolest mouse I have ever owned. It's $80, but it's definately a worthwhile investment for those of us that spend as much time online as we do.
Logitech claims that it has 20x more tracking power than optical, and I believe them. The difference is noticable, on any surface.
Here's some links on it:
http://www.logitech.com/index.cfm/pr...ID=9043,ad=g03
http://hardware.gamespot.com/Story-S...6-1373-28-30-x
