place.hbs

<iframe {{bindAttr href="view.src"}}></iframe>


<!--
  I'm getting this src:

  href="http://maps.google.com/maps?q=undefined,undefined&amp;num=1&amp;ie=UTF8&amp;t=m&amp;z=14&amp;output=embed"
-->

place_view.js

Checkin.PlaceView = Ember.View.extend({
  templateName: 'place',
  src: (function() {
    return "http://maps.google.com/maps?q=" + this.get('latitude') + "," + this.get('longitude') + "&num=1&ie=UTF8&t=m&z=14&output=embed"
  }).property("src")
});