What is a fanlisting?

Official definition

Quoth TAFL:
A fanlisting is a web clique that lists fans of a particular subject. Unlike most web cliques, a person does not need a web site in order to join. Fans from around the world submit their information to their approved fanlisting and they are then listed to show their love for the subject.

My interpretation

Fanlistings have become quite the fad since it first caught on several years ago. It first started with TFL but now, anime and manga related fanlistings fall under a separate network, TAFL. Both joining and maintaining fanlistings have become quite a hobby for webmasters. Right now, many webmasters have a "fanlisting collective", where they list all the fanlistings they own and have joined. The fanlisting-owner community has grown quite large; just take a look at the TAFL board.