It is my understanding that Citizendium requires users to submit a brief biography (a) to help other authors and editors know with whom they are working and (b) ensure accountability (a biography in addition to a real name can be used to almost perfectly identify a person).
Citizendium has a pleasant atmosphere; I've registered an account there. Nevertheless, I'm not confident that they have the right model for success. My personal opinion is that a new model is needed, one that goes even beyond the traditional wiki concept and implements novel procedures for collaborative contribution, moderation, and rating.
—Thomas Larsen