I know at least Sarah and I were interested in procedural generation and using algorithms and formulas to make sound and visuals. I stumbled across this awesome portfolio site for a guy who makes art using Processing.org and a bunch of particle attractors and fractal computations.

Complexification

Check it out. It's stunning. The only drawback is that these are missing music...... for now <_<. I'd be particularly interested in trying to get some sound evolving out of the "Bubble Chamber" or "City Traveler" demos. He provides all of the source code and encourages manipulation, so I figured, why not?

Does anyone very familiar with processing suggest using the Ess or Minim library? I've used both and each with different successes and drawbacks...