ember_playground is a simple Rails 3 Application that makes it easy to get started with ember.js and Ruby on Rails.
It bundles ember-rails for handlebars template-compilation and hamlbars to make it possible to write your handlebars-templates with haml.
ember_playground does not use ember-rails's ember version but a recent version of ember's master branch. It comes bundled with the following versions of ember.js and ember-data: