I knew that the app I was looking for existed. A little birdy sent me over to Desktoptopia and it is exactly what the doctor ordered. The wallpapers I've been having delivered to my computer dynamically have been pretty slick so far and it took about 3 seconds to download and install. Pretty sweet stuff.
Oh, while I'm at it, check out the Soul Calibur IV trailer for some pretty cool appearances by a few unexpected (if you haven't been following gaming news) guests.