Since AJ blogged about sustainable food below, it seems fitting that I follow up with this story sent to me by Debbi Honorof about a food forest in Seattle. The city is building the first ever food forest park near the Beacon Hill area in Jefferson Park. You can read about it here. The food will be free for the taking.
I've long thought that cities, with their extensive public areas, could do more with food production, or at least allow people to plant edible landscaping in some areas. It will be interesting to see how this goes. You can see a video about the park below.