New mouse's (mice's?) have been discovered. I’m a lefty so I would probably opt for the one below since I am mousedextrous.
For more information on the new mice and keyboards, checkout the press release at http://www.microsoft.com/presspass/press/2009/may09/05-19BlueTrackPhaseIIPR.mspx. And you can always get more information at http://www.microsoft.com/hardware/.
I have to admit though that the mouse above looks like a VW Beattle compared to the R8 just below it. The Audi R8 is hot. Can we get a Bluetrack R8 mouse? Grin.