Ember latest

HTML

<script src="https://github.com/downloads/wycats/handlebars.js/handlebars-1.0.0.beta.6.js"></script>
<script src="https://github.com/downloads/emberjs/ember.js/ember-latest.js"></script>
<script type="text/x-handlebars" data-template-name='application'>
    <ul>
  {{#each stuff}}
    <li>{{testHelper this.name}}</li>
  {{/each}}
  </ul>
</script>

JavaScript

Handlebars.registerHelper('testHelper', function(name, env) {
  return 'foo: ' + Ember.get(env.data.view.content, name);
});


App = Ember.Application.create();

App.ApplicationController = Ember.Controller.extend({
  stuff: [{
    name: 'Bar'
  }, {
    name: 'Buzz'
  }]
});
App.ApplicationView = Ember.View.extend({})

App.initialize();