Originally uploaded by Smithsonian Institution

If you aren't, you should be. The Smithsonian is one of the organizations, like the Library of Congress, that is using Flickr to share all sorts of images free from any kind of copyright or licensing restrictions. This makes the hippie socialist in me very happy.

For $25 a year, they have unlimited storage of photos. I know the Library of Congress encourages people to tag their photos, so they're crowdsourcing the categorization of whatever they post. That certainly saves them more than $25 a year. And this way everyone benefits because people can use the photos for whatever they want.

And we all get to look at cool pictures like this one, a supernova photographed by the Chandra X-ray Observatory.