I am looking for a good Bluetooth mouse that isn't a Mighty Mouse. Currently I'm using a Logitech G5 with the BACK button mapped to Expose and the Mouse Wheel click mapped to Spaces. I require a Bluetooth mouse with two extra buttons so I can do the same... but I don't see a way of mapping the Scroll Wheel Left/Right to Expose and Spaces. Logitech Control Center does not detect my G5, so I don't know if that is where I could configure the M555b to do this. Anyone know if it is...