Blackberries could do that, I think it was called Blackberry Connect or somethin...

myself248 3 months ago | parent | context | favorite | on: Show HN: Bluetooth USB Peripheral Relay – Bridge B...

Blackberries could do that, I think it was called Blackberry Connect or something like that. I used to use my Bold as a keyboard for my laptop when it was parked next to the projector.