One of Lee's comments on the mandelbrot set led me to something called The Game of Life. I found lots of interesting sites on the game and tons of videos on Youtube. For the uninitiated, these two videos featuring John Conway, the game's creator, are a good intro to the rules of the game. They also help to explain why the game is so interesting.
This video is my favorite Life simulation. I was thinking someone has to have mapped the patterns of Life into the audio field. And sure enough, you get both the audio and visual representation of the patterns in this video to I think a much more engaging effect.