Public Knowledge has an interesting article about ambiguous usage restrictions appearing on some US government photographs and video: 

"The White House is not explicitly claiming copyright on these photos (the license makes that clear), but this type of scary quasi-legal language gets awful close to flirting with a bit of light copyfraud."

I know a number of Wikimedians are interested / activist in this area -- Jean-Frédéric had a great session on this general subject at Wikimania 2012. Do you know any other Wikimedians working on this? Does Commons have any documentation or guidelines on the topic?