I love the great photos on Bing and I’ve been using the Bing photos wallpaper, set up as a slide show, so my background changes every 15 minutes to a new photo. Very cool!
Now the story gets even better. I just learned of a dynamic wallpaper for Bing photos. You will get two new photos from Bing each week, through an RSS feed.
You can download the Dynamic Bing wallpaper here.
For more info, see RSS-fed dynamic themes: frequently asked questions.