The Commons at Flickr.com

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If you like vintage photos than The Commons could be worth a click.

It is a pilot project of the U.S. Library of Congress. They digitized images from their collections that have no known copyright restrictions and uploaded them to flickr.com.

With the help of the community they hope to increase the value of this collection. By adding tags and comments the users should make it better search- and reusable and add supplementary information.

There are two sets available:

Even though the description may not sound so interesting, the images are really worth taking a look.

for more information:
Flickr Takes Historical Imagery To The Masses” at TechCrunch.com
My Friend Flickr: A Match Made in Photo Heaven” at the Library of Congress Blog

There is a similar approach of the National Library of Australia, which is available at Picture Australia.