[evan_]

Must've been a temporary mistake. The whitehouse's flickr account is definitely opted-out. None of their photos are darkened.

[unfasten]

At least all the photos on the first page of the photostream are darkened for me. Here's a screenshot of the first picture: http://dl.dropbox.com/u/24903613/ss/flickr-whitehouse-sopa.p...

Are you located outside the U.S.? It could also be possible that it changed in the last few hours.