Rails 4 Feature Overview (the big stuff). - @jwo
Rails Development: an Agile Approach- @ryan_marsh
Behavior Driven Design in the real world: customer requests a feature, high level story definition, then a cucumber feature, and down to RSpec tests. Then: release!
You may have seen this BDD style approach to development:
Which is very similar to the TDD:
Come see the BDD approach, experience Cucumber, and decide if it's for you!