Drupal 7.0 was officially released on Jan 5, 2011, yet there is still no Ubuntu package available. There is a Debian package available for Sid, but attempts to incorporate it into a TurnKey LAMP appliance proved problematic. I can understand concerns about relying on upstream developers for support, but in this case the availabilty of Drupal 7's built-in updates and Drush's site-install, provide the ability to obtain updates directly from the source.