If you missed the recent BlogStorm that hit Whole Foods and their wind energy cards, here is a good summary.
Personally, I don't understand why it had to be a storm. I buy wind energy credits regularly. I just don't buy it in the form of a plastic card, I buy it from a local wind energy company. The real question in my mind is this.......When will we as a society start living on renewable energy and not have to buy credits ?