I remember reading this story a while back, on the suggestion of a friend (Frey, I think), and it didn't impress me much, but I may have just not been paying much attention (sometimes I skim more than read, if I find a premise ridiculous or cliched). I might have to give this one another shot.

As to other humorous stories? Hard to say, as I think our tastes do tend to differ more often than they align, but I'll give it a shot and consult my "humor" tag on delicious...

Well, I've developed a bizarre love recently for fic I lovingly label as "meta fic," as in ones that examine silliness or slip-ups on the show, or are written from a bizarre or humorous perspective. Sadly, there are few out there that are really good. Here's what I've got though, for whatever it's worth:

Dear Mr. Mulder by Wombat (hilarious 3rd POV)
Untitled Random Casefile #4664 by Jess M. (classic author insert parody)
M. Luder, King of the "SETI Troopers" Fanfic by Livia Balaban (another classic, though it does focus, in an odd way, on the more depressing latter years)
Flea Market Economy by PunkM (complete classic, and has actually made me cry tears of laughter)

Sure, there's some odd stuff in there, but... well, I'm an odd duck. (I also maintain that the last story there is the one and only time I'll ever, EVER read gender-swap. I just don't think anyone but Punk could pull it off.) I've got a Kel story in there too, "Ricochet," but I'm sure you've read (if not already recced) that.