Film grants: Where do you find them?

Does anyone out there have any ideas for film grant resources to look at that I might have a chance of getting? After seeing countless 16mm projects that were grant-funded in some way, it makes me think that getting a grant is do-able if you have a clear vision of what you want to make. But I’m new to all of this, so I don’t know where to look or the language to use when applying, and I don’t have the pro-level experience some of the bigger grants may be looking for.

I’ve got tons of experience shooting super 8 and all kinds of video and really want to pursue a grant to help fund the purchase of 16mm equipment and stock. I have some specific ideas in mind for shooting 15-minute b&w documentaries and I’ve just been checking out the Va Film Office site and the Roy W. Dean Film Grants. Should I be looking for grants from anywhere–not just Virginia?