So, what is a fanlisting, you ask?
According to TheFanlistings.org, a fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject. In this case, the subject of this fanlisting is Dominic Monaghan/ Billy Boyd slash fanfiction.
If you're a Dom/Billy slash fan, be sure to read the rules, and then head on over to the Join section and add your name to the fan list. If you have a site, be sure to place a text link or code on your site.