Al Gore's upcoming climate change film "An Inconvenient Truth" was a darling at
Sundance, and it will be opening in limited release on May 24th (more general release is probably June 8th).
The film's web site has a link at which you can pledge to see the film on opening weekend if possible. I just signed my pledge.
From what I can tell about box-office opening numbers (garnered from some back-of-the-envelope calculations I performed on stats at IMDB), a really hot late-spring opening weekend is something like two million tickets sold. If we could turn the half-million daily DKos hits into tickets, we'd be a long way toward making the film a box office smash...