I bought (9$) and watched the Ruby on Rails 2.2 screencast from Gregg Pollack and Jason Seifer. The short review: good value for my money!
As shown on their website, the screencast includes:
- Scaling with Etags => excellent and instructive explanation
- Connection Pooling => excellent and instructive explanation
- New Enumerable Methods => not very valuable to my taste
- The New Test Helpers (using ActiveSupport) => useless when using shoulda or RSpec
- Internationalization (i18n) => barely touched on
Most of the time is spent in ActiveRecord and ActiveSupport (17 out of 44 min). They show the old way of doing things with a code sample (as it was done before 2.2), along with the new way in 2.2. They also bring in a few new 2.2 features.
Although not an exhaustive review of the Rails 2.2 features, it’s a pretty good summary in a very original format. Being very pedagogical, they are fun to watch and easy to follow.
I’m up for some more from those guys!