What to do with [[Category:Own work]]? Instead of asking each and every author for a license (with many authors probably unreachable), how about this:
1. People who upload their own work at the commons obviously want them to be realeased under a free license (otherwise, they'd go to flicker or something) 2. As they didn't chose a license, they either didn't know they have to, and/or don't care about these "legal technicalities" 3. In order to grant their obvious wish to release these images under a free license, we add GFDL and CC-BY-SA-2.5 to all of these images 4. We leave {{OwnWork}} and change it into a notice that the license information below is assumed, and if the author doesn't agree, (s)he should write a note on the talk page or fix it directly 5. Where the author is easily reachable, leave them a note what we did
Wikimedia projects live on "assume good faith", and IMHO we should do so where peoble uploaded their own images and just forgot to add {{GFDL}}.
Magnus