Bing’s Best Images as desktop background

I do look forward to seeing the daily image Bing has as background on the search page – and was really excited to see “Bing’s Best” as a Win7 theme, I’ve been enjoying some great photos rotating on my desktop…

[Update] You can also add this functionality to WindowsXP

Wallpaper Rotator , from Microsoft's CodePlex, allows to dynamically change the desktop background (similar to Windows 7). 
(Thanks to Blake from The Road to Know Where)

Personalization Gallery - Windows 7 themes, wallpapers, and gadgets - Microsoft Windows