As Jimmy announces, the Wikimedia Foundation Board has agreed with a proposal made by the Free Software Foundation that will permit Wikipedia (and other such wikis) to relicense under a Creative Commons Attribution-ShareAlike license.
That is very different from saying that Wikipedia has relicensed under a CC license. The decision whether to take advantage of this freedom granted by the FSF when the FSF grants it will be a decision the Wikipedia community will have to make. We are very hopeful that the community will ratify this move to compatible freedoms. And if they do, we are looking forward to an extraordinary celebration.
Read the Wikimedia Foundation resolution here.
The video is available, from Sylvain who was at the party: