Or you could create restful APIs simply with django-piston, django-tastypie or (my new personal favorite) django-dagny.
As far as wrappers for backbone and tastypie, I think https://github.com/PaulUithol/backbone-tastypie is a pretty good starting point, and a little more complete than what I wrote there.
Why? See http://django-rest-framework.org/howto/alternativeframeworks...