A fanlisting is a website created by a fan of a particular subject, with the aim gathering together with and listing other fans of that particular subject. The actual concept has probably been around for a long time but the term 'fanlisting' as a one-word noun was first used when Janine Mischor created The Fanlistings Network in 2000.
To join, you simply have to live in a country, have a name and a valid email address. Websites are not required and linking back if you do have one is optional -- but is greatly appreciated if you do! :)
(Sorry the Helio fanlisting was retired years ago)