If you don't know (or can't find) an existing user from whom to request an invitation, you can make a public request for one. This will display your name and memo to all other logged-in users who can then send you an invitation if they recognize you.

Your e-mail address must be valid and confirmed by visiting a URL e-mailed to you before your request will be displayed. Your e-mail address will not be shown to any other users (except moderators).