Last Wednesday, RC1 of Drupal 7 was released. I wrote about the early version in Sams Teach Yourself Drupal in 24 Hours, and I'm happy to report that the released version is even better. The two biggest goals of D7 (in my opinion, of course), were internal structural changed including moving CCK fields to Core and improving the user experience -- "user" in this case means site developers, not end-users who visit the site.