The title of Mica Sifry's article on AlterNet is The Best $24.95 MoveOn Ever Spent.  What they got for their money:

. . . if by some chance you stumble onto one Flickr member's home page, you'll discover a very odd-seeming list of tags in its cloud, led by antiroverally, approved, candlelight, cindysheehan, faceamerica, great, memberadded, mothers, photopetition, and vigil.

Welcome to the public Flickr account of MoveOn.org. With little notice, the giant liberal advocacy group has dipped its toes into the social networking slipstream, and so far it's quite enthralled with the experiment.

[edit]

The larger lesson for other organizations is this: As social networking sites like Flickr, del.icio.us (also just bought by Yahoo!), and MySpace attract millions of users, it may make sense to go where the people already are and start playing with the same tools, not only because those tools may offer all kinds of benefits to the organization, but also to see what unexpected benefits may engage people. What MoveOn is doing with Flickr is just a beginning.

We don't need no stinking media giants.