"The Citizendium is a wiki encyclopedia project aiming to create the world's finest free encyclopedia (and general reference) source, one that is reliable as well as comprehensive.

To achieve this, we are inviting the general public to help create content, but we also have a "gentle guiding" role for experts. Our contributors use their real names, and the whole project is largely vandalism-free and friendly--but also productive and growing!"

http://en.citizendium.org/wiki/CZ:FAQ