Are there any Bluetooth laser mice? I'm looking at the Logitech MX900 and MX1000. I have an iMac and the 900 is BT but uses optical tracking. The 1000 is laser but uses RF. I saw a this package http://www.logitech.com/index.cfm/products/details/US/EN,CRID=2158,CONTENTID=10776&ad=goog001&srch=1 that seems to offer a BT version of the MX1000, but I don't need the keyboard. Anybody seen a BT MX1000 or anything similar? Thanks.