[huntedsnark]

I don't understand the conflation of Rest/JSON with NoSQL. The most popular frameworks for the dynamic languages you cite all use SQL with strong schemas out of the box. Come to think of it I'm not sure why we're even associating Rest with JSON specifically or any content type for that matter when one of the major points of Rest is content-negotiation via media types. You can even implement a messaging concept with Protbufs in a strictly "rest-like" fashion.