> I don't get it. You say "in which they can"... but hasn't the
> relicensing already happened by virtue of the FSF's new wording?
> I can download all of Wikipedia, put it on my own server, upgrade
> from GFDL 1.2 to GFDL 1.3 using the "any later version" clause,
> relicense to CC-BY-SA by this new clause, and viola, all of
> Wikipedia's content is now CC-BY-SA.
I think the wording in the exit clause prevents this. Specifically, the wikipedia content in this case would be one of a class of "works that were first published under this License somewhere other than this MMC" and then you would run afoul of not having "incorporated [it] prior to November 1, 2008".