The Korg Kaoss Pad is a dynamic effect processor controled with a touchpad. You can make crasy sounds with it. e.g. the first effect of the kaoss pad is a Low Pass Filter: With the x axis you control the cutoff frequency and with the y axis you control the resonance. It would be awsome to have an application on the iPoT that can process effects on the played music and is controlled like a Kaoss Pad.