(disclaimer, I worked on this)

Facebook has focused on the social graph, Freebase connects people and more. We liked the lightweight approach of the Graph API, so here's our version: http://graph.freebaseapps.com/the_simpsons/seasons?html=1

You can even use Facebook usernames (if we have them) http://graph.freebaseapps.com/facebook.jackie/movies?html=1

One neat feature is the ?html=1 mode, which makes the JSON api browsable. I'd love to see other apis implement this.

What do you think?

Great idea and implementation. This should make it really easy for devs to target the Freebase/Facebook graphs using a single API.