It looks like Microsoft accidentally posted details regarding a new keyboard and mouse combination on its website. Engadget linked to the page but Microsoft has already removed the information as this product isn't officially announced yet.
The upcoming Microsoft Wireless Laser Desktop 6000 will retail for $105 and will include the Wireless Laser Mouse 6000 which will retail for $65. The company has also prepared the Wireless Notebook Laser Mouse 6000 at $55, and their Optical 5000 series between
Months ago Logitech already introduced its first laser-based mouse, the MX1000.