When David Heinemeier Hansson started talking about REST in 2006, little could we suspect it'd become such a central part of Rails (and of web development in general). Back then a web service meant something you coded using XML and SOAP. Those were dark times. REST changed it all.
In this talk, I'll explain REST for beginners, I'll talk about why it is such an important architecture, and I'll show all the nice things Rails offers you for building a RESTful application or a RESTful API.