Particles with Binning.
Attempted to implement Zach's binning trick, and got up to 1250 particles moving smoothly.
Then I attached their size to their velocity. I tried to comment the code well in case anyone else wants more particles.

download part a src

More Particles with Binning.
Played around more with the code i wrote for the last example. Tried to create a more organic looking shape that didnt seem as partically
The quicktime doesnt run so hot, but the program runs really smoothly

download part b src

Scrunchy Line Drawing Machine
Program that scrunches up the lines you draw and adds little arrows

download part c src