Microsoft Bluetooth Mobile Keyboard 6000 will be released next month at $90 which includes a stand-alone Bluetooth Number Pad that can be used with the keyboard or by itself. It is s thinnest keyboard ever, just a few millimeters thicker than a AAA battery at the back.

“Microsoft Bluetooth Mobile Keyboard 6000 is made exclusively for Bluetooth notebook and desktop computers. Projections show that over 55 percent of notebook PCs will ship with Bluetooth by the end of 2010.”

Stand-alone number pad that can be purchased separately for $45.

[via Uncrate]