(This is a posting to multiple lists.)
As you've probably read, the Wikimedia Foundation has agreed in principle to support an update of Wikipedia content from the GFDL to CC-BY-SA, pending a community approval of such a migration. The FSF and Creative Commons are supporting us to make this transition possible.
One open issue is the way both the GFDL and CC-BY-SA deal with embedded media files like images, sounds, and videos. The FSF interprets the GFDL so that e.g. a photograph embedded into an article would require the article to be "copyleft" under the GFDL; Creative Commons does not interpret CC-BY-SA in this fashion (at least according to some public statements).
The actual clauses are very similar, however, and I believe what is really needed is a license that gives authors the choice of "strong copyleft" for embedded media: the work into which the media are embedded (whether either work is text, sound, film, a rich media mix, or whatever) should be licensed under a copyleft license.
Wikimedia could then allow contributors of multimedia to choose this license, and to change files under the GFDL (as opposed to text) to it.
From _my_ point of view, the key requirements are:
* It should apply to any type of embedded media, i.e. not limited just to photos embedded into text; * It should, in principle, be very similar to the CC-BY-SA license, except for its provision on "Collections"; * It should be adaptable to as many legal frameworks as possible; * IMPORTANT - I believe it should allow mixing of similar licenses, e.g. CC-BY-SA into BSD -- the Definition of Free Cultural Works endorsed by Wikimedia could be a guideline as to which licenses can be mixed: http://freedomdefined.org/Definition
I would like to kickstart the discussion to get a first for such a license - it could be called CC-BY-SA+ - written as soon as possible. :-) Perhaps we should have a dedicated mailing list where stakeholders from multiple projects can discuss it?
Best, Erik Möller Member of the Board, Wikimedia Foundation