In the following document as of 2006, it indicates that 4,500 groups are using CiviCRM:
http://wiki.civicrm.org/confluence/download/attachments/573/CiviCRM_yearend_2006.pdf?version=1I know that there are issues with security, not every group wants to be known and sometimes activists may be on different sides of issues. However, I'm sure there are also many groups that are working similar issues and would not mind giving a little coaching to similar minded groups.
Google search on CiviCRM finds some
Is there other ways, perhaps optionally, to find out who is running CiviCRM and what is their cause?