SAFE is holding a continuing "Food and Farming Film Festival" in Berkeley this fall. Sponsored by Food First, CUESA, UC Berkeley Graduate School of Journalism, and others, these documentary movies are accompanied by panel discussions and presentations by filmmakers and authors like Michael Pollan.
For more on food check out Bay Area Bites (good links) and The Ethicurean (who wants to chew the right thing). Good food-oriented documentaries include:
Life and Debt