Dont forget about rss-glx screensavers!
if you guys are running xscreensaver you need to add the rss-glx screensavers to your .xscreensaver file. In your home directory in the .xscreensaver file the rss-glx screensavers need to go in the list.
If you havent already install xscreensaver and rss-glx_install
sudo apt-get install xscreensaver xscreensaver-data-extra xscreensaver-gl-extra rss-glx xscreensaver-screensaver-webcollage
Then there is a script you have to run to manually add the rss-glx screensavers into the ~/.xscreensaver file. First kill the xscreensaver process if it is already running
Then run the rss-glx install script. I dont think you have to be root because .xscreensaver is in your home directory. You should already have permissions there.
Now open xscreensaver and the new screensavers should be installed and checked. Restart the daemon and you should be all set
I realize this is years old but I am sure many are still having this problem