Collab.evergreen.edu hosts drupal sites for use by departments at The Evergreen State College. We are proud supporters of the Drupal open source CMS. Evergreen staff maintain the CAS, Form Defaults and Forena projects at drupal.org.
We've just launched a new collaboration workspace at http://collab.evergreen.edu/groups . This leverages drupal's Organic Groups module to create work spaces for people to collaborate and comment on each others work.