Rails founder David Heinemeier Hansson has said that they expect to unveil a release candidate of Ruby on Rails 3.0 by June 7.
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The latest version of the development framework will merge Rails with Merb in an effort to improve performance. The update will also feature a new router focused on RESTful declarations, an Action Rails 3.0 API, an Active Record chainable query language and JavaScript helpers.
Currently, the latest Rails release is version 2.3.8.