Carl Lerche on Rails 3 and Arel
Carl Lerche talks about the changes, design and new features in Rails 3. Also: the concepts and reasons behind Arel, the Rails 3 relational algebra library.
Carl Lerche talks about the changes, design and new features in Rails 3. Also: the concepts and reasons behind Arel, the Rails 3 relational algebra library.
The new RubyGems release 1.5 fixes the problems with Ruby 1.9.2. Gem Testers makes it easier to develop Gems that work on many different Ruby implementations and platforms.
JRuby's Charles Nutter is making Maven artifacts installable as RubyGems. An alternative to using Maven is JavaGems, built on RubyGems, Bundler and Gemcutter to make it easier to install libraries for Scala, Clojure and other JVM languages. Also, JRuby gets the ability to generate real Java classes.
Documentation generator Yard's 0.4 release adds new features such as a live documentation server which allows users to comment on the docs. The new tool Gem Bundler allows flexible dependency management.

Google Charts is a web service for generating charts. Matthew Bass explains the basics of the Google Charts interface and the gchartrb library which makes it even easier to create the charts from Ruby code.

Ben Hall shows how Ruby testing tools can help with .NET and ASP.NET development and takes a look at RSpec, Webrat, Cucumber, Selenium and others. Also: a peek at using IronRuby for testing .NET apps.

Yehuda Katz explains Rails 3: the performance improvements, the new architecture, the influence of Merb, and much more. Also: a look at the Bundler tool.
Aaron Quint talks about his projects Sammy, a Javascript port of Sinatra, and Jim, a Javascript packaging tool, as well as the state of Javascript, jQuery, Node.js, CommonJS, and much more.

Oren Teich and Blake Mizerany talk about the technology behind Heroku and the benefits of the new add-on system.