geni writes:
(BTW, one benefit of the licensing proposal is that it will be easier for Wikipedia and Citizendium to cross-fertilize each other.)
Nope. The "to clarify that attribution via reference to page histories is acceptable if there are more than five authors." bit will mean that it is imposable for wikipedia to take content from Citizendium without Citizendium adopting some very strange TOS specifically for the benefit of wikipedia which I would rather doubt it would do. Even that would not make it possible to copy content on Citizendium to wikipedia at the moment were the 5 names +URL proposal to be enacted.
I don't regard the 5 names+URL implementation proposal to be written in stone. We might choose to modify it (by, e.g., increasing the number of names, or allowing editors who insist on being listed to be listed) based on feedback here and elsewhere. But the aspect of the license update has always been to maximize the extent to which Wikipedia can import and export CC-BY-SA-licensed content. Citizendium uses a CC-BY-SA 3.0 (unported) license already. Presumably Citizendium wants both to import and export CC-BY-SA content. Any implementation by us that would require us to ask Citizendium for some kind of exemption -- which I agree would be unlikely -- is out of the question.
Note that I used the word "easier," which is a comparative, rather than "easy," which is an absolute.
--Mike