Zero downtime deploys for Rails apps
Palestra "Do PHP ao Rails" - FOCAI
Ruby de Rails
Active Record Introduction - 3
Rails 3 ActiveRecord
Ruby on Rails - Introduction
Rapid Development with Ruby, JRuby and Rails
A Z Introduction To Ruby On Rails
OSDC 2009 Rails Turtorial
JRuby - Programmer's Best Friend on JVM
Extending Oracle E-Business Suite with Ruby on Rails