Class 1 BT devices can talk to up to 8 other devices at a time, and have an extended range of up to 100 metres >most BT devices can only link to one other device at a time (which can >be very irritating). Plus they will need batteries. So my concern is >that if you have the keyboard enabled, you can't use Clicker or Address >book (you already can't use both of thenm at once). Possibly the >'pairing' will be handled by the receiving computer (the BT setup has >various types of device to link to).