I've already got an easy sound solution I used with my iPod that connects through the dock connector to an inline jack on the back of my car stereo. However, with the 4s comes Siri - and in my testing so far voice command of the music has been very convenient and useful (And this is setting aside the usefulness of voice command in GPS, dictation, etc.) So what I'd like to do is preserve my dock connector to inline jack sound setup - but also connect to a microphone (with a button to make Siri listen mounted on my steering wheel). How would I go about achieving this? I haven't seen any accessories that would easily make this work ( to be clear, a bluetooth earpiece is not what I'm looking for).