We touched on this subject at the last meeting. It would be useful if green hosting companies could post their green credentials in a verifiable way and if they were easier to find.
Certification schemes cost money to implement so we'd need a sponsor but the process could be quite simple.
Verifying the identity of their energy supplier(s) and getting independent carbon ratings (from AMEE) would not be onerous.
Then we'd need a badge device and a very simple website and not much more.