Here is an example showing use of an Observable to wrap Firebase for most convenient use in Angular 2. As I write this November 2015, it is very early days for Angular 2 with Firebase, there is not yet anything released by the latter for use with Angular 2.
There are two observable supplied here. One handles an object in the most straightforward way, the other automates the Firebase pseudo-array pattern.
See the source code for various details, and various open questions.
This is based on Angular 2, Alpha 46
Demo:
http://oasisdigital.github.io/angular2-firebase-observable-weather/
Source:
https://github.com/OasisDigital/angular2-firebase-observable-weather
Explanation video:
https://www.youtube.com/watch?v=Keth2msO9k8
Blog post:
http://blog.oasisdigital.com/2015/angular-firebase-observable-simple-weather-example/
Kyle Cordes http://kylecordes.com
Oasis Digital http://oasisdigital.com