ala http://www.methodshop.com/mp3/articles/MP3DJ/iPodDJ.stm
but there is not pitch control hack, as fas as I am aware.
This bit is pretty funy
quote:
Faux Scratching - tap the center button of the iPod and gently jog back a second or two to make the music pause. It actually sounds more like a CD is skipping, but what are going to do?