In the international area of CES, I found a company called Cellulon who are working on a new product called the evoMouse pet.  It sits on your desk and using an IR range finder technology is able to sense the location of your finger on the table, and also do multitouch sensing.  Building on that, they’ve developed a series of gestures so that draging, clicking, right clicking, wheel scrolling, forward and back, and zoom all work using natural gestures, which they claim can cut down on problems such as Carpal Tunnel Syndrome. 

It connects via either Bluetooth or USB, and even has support for Blackberry or Symbian, in addition to the usual suspects Windows XP/Vista/7 and WM5/6.

It should be available in the second half of the year for a modest $65 US.