I don't use JS much or Clojure at all. If I were the developer, I would look at adding the top used languages post haste: C/C++, Java, Python, Perl, etc.
It seems like it might be particularly well suited for HTML5/CSS3 development as well, since it runs in a browser, and that would be great to have.
Labor is the biggest cost on most productions. That is why you will hear about certain indie movies with $5k - $10k budgets that do well, and $10,000,000 movies with similar production quality. If you can get people to get excited about your movie project, or about gaining production experience, then they will often work for free or for spec. When that's the case, the biggest cost will probably be equipment.
http://www.youtube.com/watch?v=u8qgehH3kEQ