Mailing Lists:
drupal.org mailing lists
http://drupal.org/mailing-lists
List of all Drupal mailing lists, including support, development, and documentation
 

 

 
User Groups:
drupal.org communities list
http://drupal.org/community
Lists all geographic Drupal user communities
 
Drupal Dojo
http://groups.drupal.org/drupal-dojo
Companion collaborative site for DrupalDojo.com
 

 

 
Discussion Boards:
drupal.org discussion boards
http://drupal.org/forum
Lists all Drupal boards, including general, support, and development
 
groups.drupal.org
http://groups.drupal.org
groups.drupal.org serves the Drupal community by providing a place for groups to organize, plan and work on projects. Real world local user groups in particular are encouraged to setup their online presence here.
 

 

 
Chat Rooms:
irc.freenode.net
#drupal (for developers)
 
irc.freenode.net
#drupal-support (for support related) questions.
 
irc.freenode.net
#drupal-themes (for theming related questions)