Hofmockel.org

Check out these 3rd party Drupal sites that provide quality training.
Drupal Dojo - http://groups.drupal.org/drupal-dojo
IBM's Drupal Guide - http://www-128.ibm.com/developerworks/ibm/osource/implement.html
Lullabot - http://www.lullabot.com/

Know of any other Drupal training sites worth mentioning?