So, the GNU foundation came out with GFDL 1.3 today, the update to the GNU Free Document Liscence 1.2 that Productwiki currently uses.  Strictly speaking, Product wiki is liscensed under the terms of both now, (the site copyright blurb describes it as 'ProductWiki is licensed under the GNU Free Documentation License (GFDL), Version 1.2 or any later version published by the Free Software Foundation.')  The new liscence is alot... cleaner than the old one (i'll have more to say after giving it a better look over) but it includes a notable feature, it allows migration to Creative Commons Liscences.  (Stictly speaking the CC-BY-SA liscence).  It's all kinda cool and new.  Wikipedia is currently thinking about making the switch.