The fastest way to annoy someone is for the docs/examples to be out of date.

Previously Facebook has introduced API breaking changes pretty regularly, so it would be challenging at best. They've made a commitment for 2013 that breaks will only happen quarterly so it should be safer for Codecademy to commit soon.

The Facebook API is hugely varied and wide, so I'm guessing they want to try it with simpler APIs first before going after something huge like FB or Twitter (which is complicated by OAuth).

Working on it. There are some specific challenges around the way the Facebook SDK for JavaScript works in this context, but we'll get there.