Microsoft have released 32bit Vista drivers for their range of input devices. They are available from..
http://www.microsoft.com/hardware/mouseandkeyboard/Download.mspx
Finally, we get to see the on screen volume slider function as it should, and our $100 desktops sets now have full functionality as befits $100 instead of no name $5 input devices. Unfortunately, screen savers are still disabled by the Microsoft wireless desktop set receiver.