I'll think about the inquire-all-the-time option and how to implement 
it best.

Not owning a Wii console, I'm using candles to simulate a sensor bar 
as well ;-)

I've not had the time to dig deep enough into the Bluetooth APIs of 
OS X to really be able to answer that question. Sorry.

I'll consider the suggestion. It'll only be little work. Probably 
around 10 lines of code. But you already have that action available 
right on your remote: hit the power button and the remote will 
disconnect and power off.

Your scenario should work just fine once the inquire-all-the-time 
option is in place.

Best regards, 
Felix