Collaborative composing

This has nothing to do with Portland, but it's tremendously cool. From Jason Freeman's Piano Etudes site:

"Inspired by the tradition of open-form musical scores, I composed each of these four piano etudes as a collection of short musical fragments with links to connect them. In performance, the pianist must use those links to jump from fragment to fragment, creating her own unique version of the composition.

The pianist, though, should not have all the fun. So I also developed this web site, where you can create your own version of each etude, download it as an audio file or a printable score, and share it with others. In concert, pianists may make up their own version of each etude, or they may select a version created by a web visitor."

I created my own version of "Observing Squirrels" this morning.