You've split threads so I can't see the history of discussion here.
On 8/23/07, Anthony <wikimail(a)inbox.org> wrote:
Joint authors, in the absense of a joint authorship
agreement, can
grant any non-exclusive license to anyone.
Our articles aren't joint authorship in that sense. Each editor is an
independent licensee of the previous copyright holding editors who,
under the permissions of the license, creates and publishes a
derivative under the same license.