I have only one issue with Edinburgh Community Cafes - they don't talk about making sure that all cafes have wireless internet. Besides that, however, it's a pretty cool group of cafes that work together to work on projects and support each other, ensure fair trade and quality and to advertise volunteer positions and the like. There's around 30 odd cafes. The best thing - they have a loyalty card that helps with getting free soup!
As well as the website above, they also have a Facebook page.