Google's photo screensaver A great Tool

Google's photo screensaver

This program lets you display photos from a lot of online sources as your screen saver. This can be online Rss , your web album or a million other things.

If you can't find MediaRSS feeds to add, Framechannel lets you create a feed from more than 200 channels of photos that include NASA's photo of the day, travel pictures, images from National Geographic, news and weather. You have to create an account, select your favorite content and copy the URL of your feed. Then add the feed to Google's screensaver. The cool thing is that the URL of the feed remains the same even if you add or remove a channel.

This comes as a part of the google pack.