I like the "philosophy" section on the Spray site: http://spray.io/introduction/what-is-spray/ http://spray.io/introduction/what-is-spray/ It speaks nicely to

I like the "philosophy" section on the Spray site: http://spray.io/introduction/what-is-spray/ http://spray.io/introduction/what-is-spray/ It speaks nicely to what it should and shouldn't be used for at a high enough level that people new to it can understand quickly.