I'm a member of the Co-op. I paid £1 for membership, and am a real fan of it. The first supermarket in the UK to use biodegradable carrier bags, the first to stock fair trade goods I THINK, the only one of the supermarkets targeting lower income households (the other being Somerfield, Asda and Morrisons) to actively seek to promote healthier eating....
Yep, I am a real Co-Op fan. I like it when someone proves to the big boys that you can be conscientious and economically viable, when the first thing they scream is always that it doesn't make economic sense.
Also, the co-operative bank does not invest in non-ethical companies (defence companies, etc)