We have slipped the code freeze release date by a week for CiviCRM 2.0 to Dec 10, 2007. At this point, we have not changed the other dates on the schedule. We are hoping to meet those dates, but this being the holidays and given our travel / consulting / camp schedule, we might slip the other dates by a week or two.
With regard to CMS requirements, we were hoping to see a final release of Drupal 6.0 and Joomla 1.5 by end of this year. At this time we do not expect to see a final release of either Drupal (which is in beta 3) or Joomla (which is in RC3). Based on our prior experiences, we prefer not to support a CMS release till a final release is made.
As a result CiviCRM v2.0 will only support Drupal 5.3 and Joomla 1.0.13. We expect later releases to support the newer version of Drupal/Joomla when they are released