Trivia: Was originally meant to be shot entirely with web-cams, with the characters reflecting on the events through dialog in video-blogs. However, after the story grew bigger during the writing process, it was ultimately decided that it would be filmed like a more traditional film or series, and the video-blogs became more of an occasional recurring motif than a main focus.
Trivia: The film was written during the 2007-2008 Writer's Guild strike, which served as an inspiration for the production. Director/Co-Writer Joss Whedon, whom took part in the strike, wanted to make an independent project that he could create without having to deal with the red-tape of studios, unions, etc. Essentially to avoid the same sort-of issues that caused the strike in the first place.
Trivia: After the series became a major success upon release in 2008, director Joss Whedon teased that he would be doing a sort-of "sequel" at some point in the future. At one point, an outline and a number of songs for the sequel were written, though due to other obligations, Whedon had to push back production. As of 2018, the long-rumored sequel has yet to materialize, though everyone involved has continued to hint that a follow-up may still happen eventually.