http://www.symfony-project.org/plugins/sfEnhancedSecPlugin
http://www.mail-archive.com/symfony-fr@googlegroups.com/msg00863.html
http://redotheweb.com/2007/09/02/understanding-behaviors/
http://groups.google.com/group/symfony-users/browse_thread/thread/323f344d353a7fd4/2155b347d85d47f7?show_docid=2155b347d85d47f7
http://www.symfony-project.org/snippets/snippet/18
http://www.wonko.be/2007/12/12/symfony-sfguardplugin-and-securityyml
http://techstumbler.blogspot.com/2008/04/dynamic-credentials-in-symfony.html
http://www.symfony-project.org/plugins/sfPropelVersionableBehaviorPlugin
http://www.symfony-project.org/plugins/sfGuardPropelAuthoredBehaviorPlugin
