I wonder if (and if so, why) it uses the audio port, instead of the dock connector. With 3.x it's possible to access the dock connector. While I can imagine it'

I wonder if (and if so, why) it uses the audio port, instead of the dock connector. With 3.x it's possible to access the dock connector. While I can imagine it's possible to send data across the audio port (modems anyone?), it seems like a more difficult route to take. Any idea's on why they would do that?