Ruby 1.9 is out

source Ruby Inside

Benchmarks say it's twice as fast as 1.8.7, but developers worn not to use it as a production ruby rght away becouse it may a lot of libraries and Gems.
so, be worned.

ActiveRecord.js: a Relational js ActiveRecord implementation

 

ActiveRecord.js is the first released component of ActiveJS a JavaScript framework initiative sponsored by Aptana. This project is still in it's early stages and we welcome your thoughts and ideas on the future of JavaScript application development. Since this is a GitHub hosted project, if you would like to directly contribute we recommend you fork the project and initiate a pull request to merge your changes

The ActiveRecordjs Homepage

Ruby on Rails 2.2 Release Notes

Rails 2.2 delivers a number of new and improved features. This list
covers the major upgrades, but doesn't include every little bug fix
and change. If you want to see everything, check out the list of
commits in the main Rails repository on GitHub.

Along with Rails, 2.2 marks the launch of the Ruby on Rails Guides,
the first results of the ongoing Rails Guides hackfest. This site will
deliver high-quality documentation of the major features of Rails.

http://guides.rubyonrails.org/2_2_release_notes.html