The recoded audio-sys is on the way. It will support much more audio-formats using ogg-vorbis, ffmpeg, mad (mp3) etc. and has surround-capabilities.
A build for OSXintel is available at GRAFICALL:
Please take a look on it and report back.
I think, this is a great progress using audio in blender and i immediatly loved the
possibility to use aiff-files under OSX now instead of wave, ´cause this is more