The above video demonstrates the $.99 SonicLife (App Store Link) application for iPhone / iPod Touch, triggering drum samples in Ableton Live with the help of OSCulator.
SonicLife is a creative, interactive controller for iPhone / iPod Touch that sends Open Sound Control messages over a Wi-Fi network using the UDP protocol.
The application runs a simple cellular automaton on a grid of cells. The cells can be interacted with by touch and triggers of three different colors can be placed on the grid. The automaton can be set to five different rule-sets, from classic Game of Life to simple horizontal or vertical stepping. Triggers are fired by “alive” cells and send their state as OSC messages to a configurable host on the same Wi-Fi network. Cells and triggers can be randomized by shaking the device.
More information here.