The Ruby on Rails 3 Tutorial book has been updated for Rails 3.0.0 final. The arduous update process was completed by changing $ gem install rails --pre to

The Ruby on Rails 3 Tutorial book has been updated for Rails 3.0.0 final. The arduous update process was completed by changing $ gem install rails --pre to $ gem install rails --version 3.0.0 (That's a little lie—there was a bit more to it than that—but this was the only substantive change.) Thanks to the Rails core team for all their hard work!