Basically I have the same problem as juliette did on http://www.geekzone.co.nz/forums.asp?ForumId=8&TopicId=4939
I have sorted out the XP SP2/ WIDCOMM driver problem, but every time I reboot or every time the mouse or keyboard goes on standby, they do not reconnect automatically. I have to press the connect button and search for the devices under Bluetooth Places or whatever it is, and then re-pair the devices again. This process can take 5-10 mins depending on how slow the system is to recognise the mouse's presence in particular.
If anyone has any advice I would be very grateful.