http://www.economist.com/
http://www.howtodothings.com/
http://leadel.net/
http://www.cargoh.com/
http://www.symantec.com/connect/
For a comprehensive list of drupal success stories follow the below link on drupal.org
http://drupal.org/success-stories
http://www.howtodothings.com/
http://leadel.net/
http://www.cargoh.com/
http://www.symantec.com/connect/
For a comprehensive list of drupal success stories follow the below link on drupal.org
http://drupal.org/success-stories