I remember at the end of Food Inc. (which I highly recommend) the founder of Stonyfield Farm is at an organic convention pointing out which brands are owned by which Conglomerates. Coincidentally, Stonyfield was bought by Groupe Danone.
But, back to what he said, he made a good point about why he was talking to Walmart about stocking Stoneyfield yogurt. He said something like, he knows these execs haven't had a change of heart about ethics, they just know consumers are going for more organic, sustainable products.
I don't know if should stop buying these products or not. Corps obviously see the value in organics, as we can see. I do know that buying local foods is better, if you can afford it. I buy meat from an organic farm, and milk from my local Amish market, but many people can't do that. Food that is worse for you and for everyone is cheap. This point is essentially the crux of Food Inc.
As for the site, I've been looking around, and we could start a Wikia. Or just use it as an interim site until we get a real website made.