I wrote a script which downloads the latest image in a large resolution[0]
If you can set your wallpaper from the commandline, or have the wallpaper refresh from an image on disk, you could use it for a live wallpaper.
I'm also going to have the scraper check if the image has changed every 10 minutes and have it update at [1] if it has, but the image will only be in 1,100px x 1,100px resolution.