“Life in a day” by filmmakers Ridley Scott and Kevin Macdonald asked people from all over the world to film a small section of their day on the 24th July 2010. Over 5000 videos were submitted. This is another great example of getting an audience involved in creating a piece of artwork.
Here’s a link to the full film: http://www.youtube.com/watch?v=JaFVr_cJJIY
Incase thats a bit too long, here’s the trailer.