Not very bright I grant you.
However I had a Sony Erricson bluetooth kit installed in my old Cooper and found that the best place for the phone was in one of the cup holders under the stereo.
Who decided to put the phone in the armrest anyway

after all, why would you put the phone where you can't see it? You can't see the screen, can't see who's calling and it forces you to setup voicedialing.
(forgive me if the new Mini install does have some nice tricks that cover these points - but I've not seen anything yet that says it doesl!)
Considering the fact that people want both bluetooth and armrests it doesn't make much sense to narrow the appeal like this...