http://weblog.rubyonrails.org/2010/2/5/rails-3-0-beta-release http://guides.rails.info/3_0_release_notes.html gem install tzinfo builder memcache-client rack rack-test rack-mount erubis mail text-format thor bundler i18n gem install rails --pre Очень много изменений, и перевод старых приложений мне кажется будет прилично затруднен. * Brand new router with an emphasis on RESTful declarations * New Action Mailer API modelled after Action Controller (now without the agonizing pain of sending multipart messages!) * New Active Record chainable query language built on top of relational algebra * Unobtrusive JavaScript helpers with drivers for Prototype, jQuery, and more coming (end of inline JS) * Explicit dependency management with Bundler