My favouritest lexicon, Wikipedia, has a competitor. One of the co-founders of Wikipedia—Larry Sanger—has forked the project into something he calls “Citizendium”. Yeah, it’s like citizen + compendium, real clever. The idea is that of a new Wikipedia, but without the “problems” with the inherent openness of a wiki. That is, not everyone is allowed to edit the Citizendium, and “accountability” is emphasized.
Ironically, the best source of information regarding the Citizendium seems to be an article on Wikipedia.