Via macosxhints.com comes this cool article, “Display Flickr collections as desktop backgrounds”, which describes subscribing to RSS feeds as Photocasts via iPhoto.
Have a friend or family member who posts images to Flickr that you continuously visit? Are you a member of a Flickr group and want to see what’s new? This hint uses the RSS feeds from Flickr and Photocasting in iPhoto to display images as your desktop background….
Of course, you could also subscribe to your own photo feed, or tag-based feed — like, say, ATHF, so you can keep up on the latest in the Global War on Error.