A partial list of the sources of media I have on this site:
I'm not entirely sure, but I think I got the starfield background from starwars.com a long time ago--maybe in 2002.
I got all of these pictures from Google in the same time frame as the last one.
"Linux registered user" picture from counter.li.org on Nov. 10, 2007
the doorway picture from the Hall of Miscellany Dec. 6, 2007
urlbars from ubanimator.com circa 2008 (?)