<script type="text/x-handlebars">
  <p>
    <label>What should we greet?</label>
    {{input type="text" value=message}}
  </p>
  <p><strong>Hello, {{message}}</strong></p>
</script>  

App = Ember.Application.create();

App.ApplicationController = Ember.Controller.extend({
  message: 'World'
});