As I previously announced Ruby on Rails 2.0 was released.

What’s new?

Active Record

  • Performances
  • Sexy Migrations
  • Foxy Fixtures
  • XML Deserialization
  • JSON Serialization
  • acts_as Plugins Removal From Core
  • Database Adapters Gems
  • with_scope Protection

Action Pack

  • Resources
  • REST Improvements
  • Multiview
  • Record Identification
  • HTTP Loving
  • Security Improvements
  • Exception Handling
  • Cookie Store Sessions
  • New Request Profiler
  • AtomFeedHelper

Active Resource

  • Official Inclusion In Core
  • Remote CRUD

Action Mailer

  • Bug Fixes
  • Testing Improvements

Active Support

  • Date Extensions
  • Array#rand
  • Hash#except
  • Testing Improvements

..And More

If you want more details read the official announcement or check the Rails APIs.