VivaGreen was a brainchild of Pivotal Ventures Inc. This highly dynamic site featured a variety of advanced Drupal features, including a complex taxonomical structure, ad-hoc user groups, tag clouds, and a customized tabular approach to the "CCK Address" module allowing vendors to be sorted by city, state/province, country, zip/postal code or name. The company was unfortunately unable to secure a new round of funding, and the site was taken offline in 2010.
"Maybe all systems - that is, any theoretical, verbal, symbolic, semantic, etc. formulation that attempts to act as an all-encompassing, all-explaining hypothisis of what the universe is about - are manifestations of paranoia."