As a powerful framework for developing Web apps rapidly, Ruby on Rails is a natural fit for fast-paced projects. But just being fast doesn't make you Agile. Agile teams deliver frequently, at a sustainable pace, while adapting to change. For many so-called Agile teams, achieving a "sustainable pace" is a real challenge. Thus the real power of using Rails doesn't come with the ability to get stuff done quickly. Rather, it comes from Rails' support for automated testing, incremental database development, and rapid deployments. Those simple affordances that are baked into the DNA of Rails mean that it supports Agile engineering practices including test-driven development, continuous integration, and continuous delivery. The center of this talk will be a current Rails 3 project that is using Haml and Sass for markup, RSpec and Cucumber for testing, and Hudson for CI. (And yes, we can even look at real code to see how it all works.) Bio: Elisabeth Hendrickson wrote her first line of Ruby sometime around 2003 and worked on her first Rails project in 2007 (though she didn't grok Rails until just this year). She is the founder and president of Quality Tree Software, Inc., a consulting and training company dedicated to helping software teams deliver working solutions consistently and sustainably. She also founded Agilistry Studio, a practice space for Agile software development in Pleasanton, CA. She's also a co-director of the Agile Alliance Functional Testing Tools program. You can find her on Twitter as @testobsessed.