Short answer: Yes. Long answer: Mplayer will be used as a backend and therefore A2DP should be supported. Mplayer for OS2008 is still in development though and there are some problems with video playback when using alsa (I believe this is required for A2DP to work). I expect (and hope) that the problems will be fixed soon and A2DP should then be supported. There is a lot of information about this in other threads.