From official announcement (http://citizendium.org/):
We believe a fork is necessary, and justified, both to allow regular people a place to work under the direction of experts, and in which personal accountability--including the use of real names--is expected. In short, we want to create a responsible community and a good global citizen.
I like the more 'anarchist' approach of Wikipedia. From the article you linked:
That said, I am troubled by some aspects of Sanger's Citizendium. Aside from its pretentious title (which participants are already saying must be changed), this feels in some ways like an attempt by old-guard academics to retake control of humanity's knowledge. - Jason Sanford
Those were almost exactly
my thoughts after I heard about Citizendium on the radio!
Two more great quotes from the article:
Basically what I think works in a wikis is to trust people to do the right thing, and trust them as much as you can possibly stand it, until it hurts your head and makes you scared for what they're going to break. Because that is what works. - Jimmy Wales
My belief is that Wikipedia's success dramatizes instead a change in the nature of authority, moving from trust inhering in guarantees offered by institutions to probabilities created by processes. - Clay Shirky