On: There is no sane reason for the dock connector to ...

[jemfinch]

I can't imagine it's accomplished very much differently than any radio-transmitting iPod attachment for a car.

[daeken → jemfinch]

A radio transmitter for iDevices will use the audio out lines on the dock connector, whereas the USB cable purely breaks out data, as far as I'm aware, so they must be doing something different.

[jemfinch → daeken]

I must have misunderstood you, and now I'm intrigued: what connector does an iDevice have other than the dock connector and the headphone connector?