The reason why Remote Buddy fails to cooperate with your Wiimote is 
that it is completely ignored by the Kernel Extension for its unusual 
device address. Knowing this, though, a fix is easy and will be part 
of the next update (probably Preview 15 c / RC2). I can mail you a 
test version, if you want.

The iStumbler output is totally fine and contains all info I needed, 
so I'll not need any further data from you.

Best regards, 
Felix