There has been some small discussion about
processing and though i would share the wonderful link to
openprocessing.
It's the main location for sharing sketches with the community and contains over 6000 sketches. There are some nice gems in there. Check the all time top and the
demoscenes tag
I'll also take the opportunity to mention that I completely redesigned the
Plane9 webpage and took some ideas from the openprocessing site for the redesign. Plane9 is in a small way like processing but dag node based and using cgfx shaders for the real neat parts.