If you haven't seen it, you should check out The American Experience on PBS--they're broadcasting Eyes on the Prize, which is a stunning documentary every citizen should see. I only wish it were available for purchase when I was still teaching, because I know for a fact my students needed to see it badly.
Hopefully PBS manages to get all the rights to all the footage and photos so they can issue a DVD. For years the film has been held up by legal fights over such rights. Tape it if you can!
Update: It is now available on DVD. Pricey, but worth every penny.