Great job! I like the chapter 2 very much.The explanation to git/github and deploying it to Heroku is great. What I would like to see are: 1. Explanation to the main concepts of dynamic web application. Something like this:http://philip.greenspun.com/seia/basics 2. Make the example to a considerable complexity. And show it at the very beginning.

I consider it a tutorial on how to develop a web app more than a rails tutorial.