Audition for the YouTube Symphony Orchestra. Using an instrument of your choosing (any instrument), learn "A Symphony for YouTube" by composer Tan Dun from sheet music and instructional materials on the site, then submit a video of you playing it. You'll also need to make a video of a more traditional audition piece. Those chosen will be invited to perform the Tan Dun piece at Carnegie Hall under the direction of Michael Tilson Thomas.

The site includes a video of the London Symphony Orchestra playing the symphony, videos of the conductor with audio for practice and without audio for recording, and master class videos from LSO members about the separate parts of the piece. The master class videos are especially cool, because they spend a few minutes on the Tan Dun piece, then talk about other pieces on the audition lists and playing music in general.

Seems oddly old school to have the final performance be in a concert hall. Where's the online audio forum for live collaborative practice and performance sessions? Hello, 21st century?