These support audio I believe. Make sure it's a genuine apple one and not a pattern copy off ebay though. Many of the cheap copies won't support audio.
This'll open up a wider choice of HIFI for you I'd have thought?
http://store.apple.com/uk/product/MD...PLA-PLA_UK_BTB
http://store.apple.com/uk/product/MD...PLA-PLA_UK_BTB
