There some great resources to be found at the sites listed below. Note for some of the organizations there are member fees
http://www.shootingpeople.org Shooting People - a great place to network plus has newsletters of upcoming events in SF/LA market. NY market, and UK market. As well as a scriptwriting newsletter. All of which geared towards Independent film makers.
http://www.filmindependent.org Film Independent is comprised of Independent Film makers and those who love independent film, They offer great classes on film.
http://fracturedatlas.org Fractured Atlas offer a service to help find money for your film. Getting health coverage for Indi Film
makers, actors etc.