For those of us who live in the East Bay, I've found a really nice resource, Three Stone Hearth (or as our droll nanny likes to call it "Three Stoner Hearth"). It's completely crunchy (in a charming sort of way) organic, prepared food co-op located in Berkeley. It's hidden away nearly under the University Avenue overpass...right at the foot of the pedastrian footbridge over 80.
The way it works is that a couple of the owners of the nonprofit, along with a set of volunteers, cook an interesting array of foods weekly from very local, organic farmers and then sell it to the public. It's not cheap, but it is the highest quality and delicious. You can also buy unpasturized milk, eggs from chickens who live running around in pastures, and a few other essentials. You can order from them in advance, or can drop in on Wednesday at 5 to see what extras they have available for sale.
They also make a killer fermented Lavender drink that is quite yummy.