I don't know too much about bluetooth. I'd like to get the Logitech Bluetooth Mobile Pro Headset for talking on skype. I don't know which USB bluetooth adapter to get for it. I'm using windows XP but, it would be nice to get one that's Linux compatible too. I'm guessing that the adapter should be Bluetooth v1.2 compatible. What's the diff between v1.1 and v1.2?