I am actively building a dashboard webapp for my startup using scala.js. It is incomplete, but evolving quickly.
My initial prototype was based on angular.js, using the angulate bindings. I later replaced angular with a reactive-style mesh of scala.rx, scalatags and scalacss, which is takes advantage of the scala type system. All the logic/rendering is type safe and in one language (scala), rather than being spread across "stringly-typed" HTML, CSS and JavaScript
Although this webapp is being developed as an internal tool, it should be able to demonstrate scala.js in a real world application once it's finished.
