Awesome desktop wallpaper

There are so many cool things about flickr I kinda think I'll never get to know all of them, but every time I find a new feature I'm delighted.  Today I stumbled across a group within flickr (not sure I understand the difference between "groups" and "pools" on flickr) dedicated to photos that would make good desktop wallpaper, which is awesome.  Being a massive nerd, I downloaded a bunch and then being an even massiver nerd, I put them in a queue for my automated desktop wallpaper switcher to rotate through.  Being the massivest nerd possible, I looked around for software that would check this group and automatically pull photos down for me, but had no such luck.