Deactivation is what Facebook directs everybody to, but there is actually a way to completely delete an account too. With an actually deleted account, you have to create a new one, there isn't a reactivation option.
Given that Facebook creates shadow profiles for "users" who have never had a Facebook account, I wonder what "deleted" really means in terms of Facebook's social graph. Is your identity back to being treated as a shadow profile or is there now an empty hole in the graph?
