Several months back I posted a list of links to several online resources that planners can use to help shortlist cities for sustainability. Happened upon two more resources I wanted to add to that list from August 2008:
America's 50 Greenest Cities
This list does not directly consider sustainable meeting features, but does rank cities according to electricity, transportation, green living and waste management issues. Incidentally, 6 of the top 10 cities listed do have known green meeting initiatives: Portland, San Francisco, Boston, Eugene, Seattle and Chicago.
Smarter Travel Top 10 Green Destinations
Surprisingly, Portland, OR, tops this list as well. Again, not designed specifically with meetings in mind, this list may present some ideas for incentive and small group travel to urban and non-urban locales internationally.