The Climate Spark Social Venture Challenge web site hosts an exciting online competition that invites green entrepreneurs to submit their social venture ideas and for the public to browse, comment, and vote on their favourites. This highly interactive CMS site features a points tracker, top entries ranking, tag cloud, and more. Most successful challenge to date, with 61 venture entries, 2,300 community members and 19,000 site visits during the three-month online challenge.See the full site here