Ruby and Sinatra's shotgun wedding

WTF is a RESTful web service and why would you ever use one?

Come find out how to quickly and easily create simple web services using Ruby, Sinatra, and Heroku for fun and profit.

I will briefly describe what REST is and why it matters and then show how I created a dynamic ad module that @griffintech uses in it's mobile apps to serve updated ad content on a regular basis.