Dr. Marco Langbroek, from the Netherlands, recently posted to his blogspot a couple of interesting graphics. During a self proclaimed day of bordom, he created two plots of all the classified satellites listed in Mike McCant's classified TLE set. It is pretty neat to view. Be sure to click on the small images to enlarge. You can view these two graphics on Marco's blogspot at:
http://sattrackcam.blogspot.com/2006/10/quite-lot.html