Sentence:  Chris Carter may bar X-Filers Mulder and Scully forever from consummating their deep bond—but it's a common fantasy in the archives of <WSD>fan fiction</WSD>, where familiar TV and movie characters populate digital poems, scripts, short stories—even full-length novels—that span hundreds of websites and Usenet discussion groups. Readership figures are elusive, but fanfic's America Online index page has collected a half million hits in the past year. 
Meaning of the word marked with <WSD> tags:  Amateur fiction created by fans, incorporating the characters and concepts of a commercial media property, typically without permission from the author or owner.