I have no opposition, in principle, to just about any sort of license, so long as it preserves what I think are the essential features of our license, namely: that no one can make our work proprietary (closed). I would not be happy with a BSD-style license, for example.
But I do think that the practical obstacles to dual-licensing are pretty high.
Kurt, can you sum up for us what advantage the license you linked would have over the GNU FDL?
--Jimbo