This happened while Choire was minding the store so apologies if you've seen it already, but Flickr's new Commons program is quite interesting. For a start, the Library of Congress has put 1500 photos with "no known copyright restrictions" up on Flickr for people to tag and annotate. The LoC's extensive online image repository has always been exceedingly difficult to use so making images available on the easy-to-use Flickr is a great step forward. The response so far has been pretty good.