Author has written 100 stories for Buffy: The Vampire Slayer, Harry Potter, West Wing, X-Files, Smallville, Discworld, Stargate: SG-1, Heroes, Alias, Star Trek: 2009, Ultimate Marvel, Marvel, Fantastic Four, Thor, Black Books, Rat Patrol, From Eroica With Love, Legend of Zelda, Blackadder, and Stargate: Atlantis.
I have not retired from fanfiction writing, though these days I don't have as much time for it as I used to. I tend to hop from one new fannish interest to another, but it's not impossible that I might revisit some of my older fandoms one day. I never really abandon a fandom, just drift away into other waters and then drift back when something reawakens my interest.
I've been trying to write more short stories so there isn't such a long gap before I post anything, but given that my writing brain defaults to "epic novel", I wouldn't recommend that anyone hold their breath.