Just wanted to let everyone know that we recently launched http://www.greenhostrankings.com to review & rate green hosts. We’re just getting started, so the content is limited right now, but we’re working on getting some more info ready. At present, we have rated most of the hosts mentioned above based on their transparency, extent of carbon neutrality, certification and verification, presence (or lack of) an environmental management plan that goes beyond carbon, as well as other factors.