I use something similar, Webilder, but you misunderstand me. When you use
Wallpapoz or similar program it just changes the wallpaper like Webshots for
Windows does, but KDE has that capability built in. In addition if you have four
virtual desktops you can have a different one on each desktop instead of the
same one on all. That is what Gnome lacks and Wallpapoz does not give it to you.
It only cycles wallpaper at regular timed intervals from a folder of your
choosing. BTW, Webilder (not a spelling mistake) is available from Getdeb.net
and it will download photos from Flickr or Webshots and cycle them at timed
intervals. There are KDE and Gnome versions. In addition to Wallpapoz, there is
also Wallpaper Tray in the repositories which will cycle wallpaper. As far as I
know only Webilder downloads wallpaper from the net and cycles it at times
intervals. Once installed you can add it as an applet so it will always be
running.