In this episode Rob fixes up a glaring hole in the WebMatrix story: the lack of testing. Quixote was created in this episode and is a high-level testing/acceptance framework built on Razor and, yes, System.Dynamic. It's also one page coming in at less than 500 lines of code.
In this episode Rob takes on Migrations - a feature that is the cornerstone of building out your database in Rails. Borrowing just about every concept from that framework, Rob turns JSON and System.Dynamic into a flexible database schema builder.