Some good news on the BY-SA/FDL compatibility and Wikipedia relicencing fronts:
Resolution:License update - Wikimedia Foundation
Progress on license interoperability with Wikipedia
Some important news from Wikipedia to understand clearly
And the Slashdot discussion about this is a good mixture of FUD and answers as usual
The FSF moving towards BY-SA/SFDL compatibility and Wikipedia moving towards relicencing are all very good news.
An unexpected effect of all this seems to be renewed calls for BY-SA to have “stronger” copyleft, which would be a good thing if possible. It’s time to put aside legalistic objections (which have never been raised against NC’s conception of use) and community objections (which amount to a defence of breaking the social contract of copyleft) and try to move to stronger copyleft for BY-SA.