Hexelsior is currently cooking now. It's an infinite (in the 32-bit sense) array of hexagons, each with its own number, which sends an OSC message when it's touched or released. Multitouch is enabled, and there's a primitive synthesizer built in for feedback. Also, you can zoom in and out and I'll probably put in a few more features before releasing it. But it's primarily an OSC client for driving external synthesis.