First off, to join this web ring, your site must have at least some type of sighting, UFO, or Alien setting to it. Second, you don't have to be in geocities, but it helps.

You Can:
Submit Your Site, or edit it.
And once you have added your site to the que, you can add the HTML fragment so that you can be added to the actual ring. The code is sent to you with a confirmation e-mail.