Create a Windows screensaver that uses standard technologies (for example, this means you
cannot use Flash). The screensaver should look like the standard iTunes Artwork screensaver. Pretty much exactly like how this video looks. ([url removed, login to view])
The only real difference is that the images will be URLs and not images on the local computer. The url will be provided by a website, so loading the website will give you a url, and this url will be of an image, which you can use to make as a tile.
I'm assuming that if you're familiar with some form of C, then this should be a fairly quick project.