Creating a RSS Feed based Windows Theme Background Slideshow

I was listening to Windows Weekly on my Zune this morning, and Paul’s Pick of the Week was the Bing Dynamic Theme, which dynamically displays new photos from Bing as your desktop background.   Awesome… this is just like Webshots back in the day! (Errr… I guess they are still around at http://www.webshots.com/.  We’ll use that information in a second.) When downloading the theme, I noticed that it