...
Drupal:
Main Site: http://drupal.org/
Wiki: a wiki about drupal wiki http://groups.drupal.org/wiki
Downloads: http://drupal.org/project
FAQ: http://drupal.org/Troubleshooting-FAQ
Documentation: http://drupal.org/handbooks
API: http://api.drupal.org/
Testbed: http://testing.drupal.org/examples
-------------------------------
Reference Sites (some): http://www.drupalsites.net/
http://www.theonion.com/content/index
tim berners-lee blog http://dig.csail.mit.edu.ezproxy.canberra.edu.au/breadcrumbs/blog/4
------------------------
Case studies:
Popular Science - http://drupal.org/node/233090
New York Observer - http://drupal.org/nyobserver
Fast Company - http://drupal.org/node/220591
CalArts - http://drupal.org/node/176482
Warner Brothers Records - http://drupal.org/node/162162
---------------------------
Helpful Links:
drupal modules review
http://drupalmodules.com/
-----------------------------------
http://tips.webdesign10.com/how-to-make-a-drupal-theme
----------------------------------
drupal 5.7 theming screencast
http://drupaldojo.com/files/screencasts/drupal-dojo_lesson28.mov
drupal 5.7 theming screencast
---------------------------------
http://www.lullabot.com/videocast/drupal_actions_and_workflow_video
-------------------------------
http://www.rhinocerus.net/drupal-handbook/drupal-configuration-and-customization
-------