Citizendium has finally picked a license - they've gone with a Creative Commons Attribution-ShareAlike license [1]. This is good news. Until now, Citizendium was in a big holding pattern trying to figure out how it was going to license it's work. Citizendium articles can now be circulated much like Wikipedia articles are.
So, is the Citizendium a "commons." This makes it more difficult to argue that it isn't a commons (I am making this argument in the chapter that I'm currently working on). However, Citizendium is still quite different from Wikipedia - I'm just going to have to articulate those differences very carefully.