Here's a good idea: Bucking on the the increasing popularity of online films, internet start-up TurnHere is seeking professional and independent filmmakers who live in the United States to participate in an initiative to chronicle life in American neighbourhoods through two-to-five-minute-long films. The site claims it is attempting to make "the largest documentary on American culture ever made. Films should be artful and high-concept, focusing on the people, culture, history, local businesses and political landscapes across America". Each film gets its own URL so that it can be forwarded via email.
More info on the beta version of the site.