Update: Drupal 6.0 Beta 3 is available now!
Our first Drupal 6 beta version was released just over a month ago, so given the large number of usability improvements and bug fixes that we've added since then, we're proud to announce the release of the second beta version of Drupal 6.x for your testing. This beta version includes all the latest security bug fixes as released in Drupal 5.3 and 4.7.8. The first beta announcement provided a comprehensive list of improvements made since Drupal 5.x, so in this announcement we'll concentrate on how you can help ensure that Drupal 6 is released as soon as possible and is as rock solid as the previous Drupal releases that you've grown to love!
The most notable change is that we moved the long time favorite Drupal.module out of the Drupal package. It will instead be available as the contributed Site network module. This was done because Drupal 6 has a more secure and widely supported solution for distributed authentication in the form of the OpenID standard.
We've also fixed a number of issues since the previous beta. We fixed numerous PHP notices, upgraded to jQuery 1.2.1, included a more secure solution for IN() queries, added schema based load and save functions, extended built-in AHAH functionality so developers can write AHAH code without JavaScript for different types of form elements, merged .schema files with .install files, made it possible for themes to override core and module CSS files and made it possible to have comment settings per node type, among a number of other improvements.