If you're interested in emergence and artificial life, I've been working on creating in JavaScript a lot of the work that has been done by others in the past as well as some original projects:
The last project (The Evolution of Color) has similarities to the color visualizations described in this post: it uses genetic algorithms to evolve a population of colors towards a fittest color as determined by the closeness of the bits that comprise the colors.
I have a few other projects planned so if you're into this stuff you're welcome to sign up for the mailing list to get notified when they are launched:
http://www.emergentmind.com/newsletter
I'm always open to ideas for new projects so if you have anything you'd like to see implemented or want to work on something together feel free to shoot me a note.