http://www.microsoft.com/presspass/press/2010/feb10/02-24HardwareBlueTrackPR.mspx?rss_fdn=Press%20Releases

Microsoft Hardware said Thursday that it has added three new mice to its current BlueTrack Technology-based line of peripherals. The new models will be dirt cheap, costing just under $30, and includes the Wireless Mobile Mouse 3500, Wireless Mouse 2000 and Comfort Mouse 4500.

All three were touted with the ability to "virtually" track on any surface, designed for the mobile consumer who doesn't have the room or patience to carry a mousepad. Supposedly these guys even track on glass.

All three mice are now available for pre-order on Amazon starting today, however the 2000 and 4500 won't ship until March; the 3500 model ships in April.