Hey,
Just a few minutes ago, we released Drupal 6: http://drupal.org/drupal-6.0 The release announcement goes through the most important improvements, including our easier installer, drag and drop support, multilanguage foundations implemented, actions and triggers, OpenID support and Update status module integrated, improving easiness of theming by an order of magnitude, better security and lots of smaller improvements as well.
We took a lot of time making this release easier and more secure to use from cleaner permission names and more consistent button titles through forum improvements to the bigger advancements like OpenID which was just announced to be backed by Google, Yahoo and Microsoft as well.
Hop over to the release announcement to learn more, check out the installation and upgrading videos for help and the multilanguage video as well as the new feature screencast for more (visual) information on what's new.
Hoping to welcome even more Drupal users with Drupal 6, Gábor Hojtsy (Drupal 6 version maintainer)