Hi!
I discovered that Panoramio started to support Creative Commons
licenses 3.0. Looks like my e-mail back into the June 2007 had some
influence :-) See
http://www.panoramio.com/user/519353 as example but
please don't export - all of this photos are in Commons already :-)
Unfortunately licenses are revocable as in Flickr.
I also don't aware of the simple way to filter CC-BY and CC-BY-SA
images only. Web interface doesn't have this feature.
Original Panoramio blog announcement:
http://www.panoramio.com/blog/new-update-around-600000-new-photos-from-pano…
Eugene.