Default Android, Hero and audio caps

Could anyone who has expierence give any tips on writing for the audio / streaming system for Android. I am not tagetting any hw platform in particular but I would like to fasttrack my app to the market, it will be a free app initially as it will be ported from code already written.

If possible I want to do as much as possible on hw though from what I have read this may not be possible. Anything help would be very helpful, if not ill endeavour to update this thread with any info i pick up on the way.