Excellent! But I think you didn't go far enough. I would do a "folding" one. That is the phone opens like a clamshell, but their is no screen inside. Closed: small B&W screen, basic phone keypad. Opened: complete keyboard. But why do you want to switch from BT thumb board to phone? Why not the two working at the same time? What I fear is that you can not have at the same time on BT: - The N800 paired with the phone for control (start / stop com, edit contact, send SMS) - The phone paired with the N800 as "BT keyboard" - The N800 or a BT headset paired with the phone as "BT headset". Hey Nokia, this thread ROCKS!