I don't see why you can't make your proposal work. The limiting factor for your setup would be how well the information transmits from the wireless sensor bar back to the Wii. I am assuming that you can view the wii source on the link TV, right? (sorry, I know, silly question)
The white Wii box doesn't have any sensors of it's own, and relies on the sensor bar for all it's wireless communications (to controllers, I believe).
Great idea! Hope it works!
-Sal
P.S. wondering where to place the sensor bar on the BV8... without having it affect it's looks... I'm going with a wall bracket, so maybe the sensor bar can be mounted immediately under the "shelf" of the television...
Love B&O, but no longer addicted.