From the Peter Pappas blog Copy/Paste:
The Smithsonian collection of photos has become part of the Flickr Commons group and joins the photo collections of other institutions such as The Library of Congress, the Brooklyn Museum and the Powerhouse Museum. The Commons was launched on January 16 2008, in a pilot project in partnership with The Library of Congress. Both Flickr and the Library were overwhelmed by the positive response to the project!
Plus you can search these images with PicLens, a free plug-in, which works in Internet Explorer, Firefox, Flock, and Safari. It lets you create a moving wall of images where you’d otherwise just see your Web app’s more static display of pictures. Launching the viewer is just a matter of clicking a new “play” icon that appears on images when you’re on a PicLens-supported site.