Head over to http://fallingfruit.org and do a filter for "Freegan". My locale has people marking dumpsters with food that is available. And if dumpster diving isn't your thing, then wild edibles is another option. I personally haven't dumpster dove for food, but based on what I have read, you'd be hard pressed to starve in the US.

http://fallingfruit.org/sharing?c=forager%2Cfreegan&locale=e...