I'm currently working with bluetooth on Palm devices and the issue is trying to get all the information needed to implement this. More at http://en.wikipedia.org/wiki/A2DP#Advanced_Audio_Distribution_Profile_.28A2DP.29
I'm a little unclear on your question. Maybe you thought this stuff was working? Or didn't understand that the quality they implemented was for earphones so you don't want to pipe it to say "nice speakers."
What's the deal with MBP and A2DP? Sure it's compatible with Leopard, not Tiger, but I hear that the sound quality is mighty poor.