Ember CLI - RESTAdapter for 3rd party API

I can get data into my app with ic.ajax, but it seems like I should be using the RESTAdapter. The explanations are so simplified, that I'm not sure what to do in various cases. This is what I think should work: (and does with fixtures, a local express server, and http-mocks)

I'm going to use tumblr as the example - since it's always been friendly API in general.

router.js

import Ember from 'ember';
import config from './config/environment';

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {

  // tumblr posts
  this.resource('posts', {
    path: '/tumblr'
  });

});

export default Router;

routes/post.js

import Ember from 'ember';

export default Ember.Route.extend({

  model: function() {
    return this.store.find('post');
  }

});

So, as far as I can tell - find() is some magic ajax call... but what if I want to specify jsonp or something?

adapters/post.js

import DS from 'ember-data';

var tumblrBlogName = 'feministlibraryonwheels'; // friends site
var tumblrApiKey = 'UbB4p0GxqNa6wUa8VwpIdqtywjIiA6vljZXyI9wkx9hnQnAFyk';
var tumblrRequestUrl = 'http://ift.tt/1lEddIw' + tumblrBlogName + '.tumblr.com' + '/posts?api_key=' + tumblrApiKey;

export default DS.RESTAdapter.extend({

  host: tumblrRequestUrl

});

This is a little whacky, because the long tumblr endpoint-thing is so squirly - I feel like it should just be http://api.tumblr.com and maybe there is another way to specify the other stuff... or does it just somehow know... very confused... seems like namespace: 'v2' is what that option would be for...

templates/posts.hbs

<section class='container stage'>
<div class='inner-w'>

    <h2>tumblr posts</h2>

    <ul class='block-list event-list'>
        {{#each}}
            <li>
                {{title}}
            </li>

        {{else}}
            No posts are coming up... what's up with that?
        {{/each}}
    </ul>

</div>
</section>

Then this {{#each}} just knows what it's supposed to look for in most cases - but I would like to be explicit.

In all the tutorials I've seen, it's a local server - or http-mocks - and it's just something like this:

import DS from 'ember-data';

export default DS.RESTAdapter.extend({

  host: 'localhoststuff:3000',
  namespace: 'api'

});

Then on top of this - I get what seems like a cors issue GET http://ift.tt/1AbLx7h 401 (Not Authorized)

and it's not like it's really hidden... http://ift.tt/1CRIYHb

What is the missing link between many quick tutorials - and the RESTAdapter in the real world - with real API's ??? Any direction will be very appreciated.

Also, here is some ic.ajax() attempts I was making as well. The payload gets to the console - but it gets foggy when trying to get the data into the templates

import Ember from 'ember';
import ajax from 'ic-ajax';

export default Ember.Route.extend({

  model: function() {
    var libraryData = ajax({
      url: 'http://ift.tt/1AbLyry',
      type: 'get',
      dataType: 'jsonp'
    });
    console.log(libraryData);
    return libraryData;
  }

});