WSJ.com - Rewriting the Rules of Fiction: "Fan fiction, stories by amateur writers about characters from their favorite books, movies and television shows, was once mainly a fringe pursuit. Now, it's changing the world of fiction, as Internet exposure helps unknown authors find mainstream success. Some Web sites are attracting unprecedented numbers of readers and, in some cases, leading to book deals. They are also feeding the appetites of readers and viewers who can't get enough of shows like 'Lost' or 'House.'"