Your Favorite Net.Art?

worm eater asks: "About four years ago I became interested in trying to discover art sites on the Internet. Not sites that deal with art, but sites that are art. After many hours of searching, I stumbled on a few that I enjoyed: jodi.org (although this one currently appears to just have a cool little downloadable screen-distorting program for Mac OS 9) so you might want to try, a few of these groundbreaking and sites. [Note: Beware of <BLINK&gt tags!] Recently, my interest in this genre of art has been reignited. What is your favorite piece of net.art?"