I can't quite figure out why anyone would want an RSS Screen Saver. And yet, it's kind of intriguing:

One of my favorite features of C# Express is the built-in RSS Screen saver Starter Kit. If you've never built a screensaver before, or if you have never written code that uses RSS, then you'll find the RSS Screen saver a great way to start programming.

In a nutshell, the RSS Screen saver is a screen saver that lets you select and validate an RSS feed, select a background directory for images to loop through, and the screensaver will loop through the items in the RSS feed.

...via The Shifted Librarian