Were you able to find one? I clicked through to a couple of their "participating websites" (google.com and hilarious.be are listed), generated a 404, and got bupkis. At that point I assumed this was some sort of bizarre joke.
Their list of participating sites is mostly bogus. I think it's generated from their form which prompts users to configure a site -- this would explain the inclusion of some otherwise inexplicable "sites" like http://facebook/ (yes, no TLD) and http://example.com/.
