Leo says that he can't use Airplay unless the receiver is supported by Airplay. He can get it to work via aVia, but it plays at about 1/3rd speed. Leo says that Media:Connect is a DLNA program, and Airplay is just an Apple proprietary form of DLNA, so it sort of works. Clearly, it doesn't work that well though.
He also could get a Sonos Bridge which would play content from his phone but also a variety of other internet sources through his stereo.