myroute.js

var MyRoute = Ember.Route.extend({
  model: function() {
    // this will resolve
    return Ember.$.ajax().then(function(data) {
      // then this will resolve
      return Ember.RSVP.hash({
        data: data,
        items: Em.RSVP.all([
         Ember.$.ajax({url: data.item1url}),
         Ember.$.ajax({url: data.item2url})
        ];)
      });
    })
  }
})