Glenn Marshall has released his finished version of Metamorphosis, a beautiful piece of computer generative art programmed in Processing. I wish I knew a bit more about what I was seeing, but I can only guess that the branches and butterflies follow certain laws of nature and rules defined by the music (I hope). Nevertheless, it's beautiful. Here's the video below, but go to Vimeo to watch the video in all it's HD glory.
Metamorphosis is a followup to Marshall's first video - Music is Math, which is equally beautiful: