PictureShare.net Wallpaper Manager - Simply the best wallpaper changer ever made.
The PictureShare.net Wallpaper Manager features an elegant user interface, mutliple-monitor support for different images on each display, watch directories that pick up new images automatically, and it's internet enabled so you can share your images with friends and family. Wide-screen displays are explicitly supported, and large collections are easily handled. Easily deal with 100,000+ images. You can rank images so it shows your favorites more.