Add more links to popular Backbone references.

README.md

@@ -789,6 +789,21 @@ App.PhotoView = Backbone.View.extend({
 $("a.photo").click(function() { ... });
 ```
 
+Other links
+===========
+
+Other links of interest:
+
+* [Backbone][backbone] official documentation
+* [Backbonetutorials.com][bbtutorials] by Thomas Davis covers the basics of
+  Backbone.js in more detail than the official docs.
+* [Backbone Fundamentals][bbfund] by Addy Osmani is a Creative Commons book for
+  beginners and advanced users alike.
+
+[backbone]: http://documentcloud.github.com/backbone/
+[bbtutorials]: http://backbonetutorials.com
+[bbfund]: https://github.com/addyosmani/backbone-fundamentals
+
 Acknowledgements
 ================