via hackaday
in his excellent piece of iPod artistry. It's one of the most original iPod hacks I've seen yet. (Aside from his funky dock) I haven't checked up on the latest iPod dock specification, but I'd guess he's sending the command signals via the serial (TTL) interface with a microcontroller(pic/atmel etc) to encode the button presses.
http://www.youtube.com/watch?v=scnjoG_C6Sw
