thistlechaser | Wanted: One ASRWLL Christmas Challenge

I'm hunting for something, but Google fails me. Apparently some group/place had a HP Chirstmas fanfic challenge. I've found two fics from it, one being the one I mentioned in my last post (When We Were Gone Astray), and the other Wine But No Women: A Death Eater Christmas. Neither lists who ran/hosted the challenge.

Both of them had the same requirements:
You must write a Christmas-related scene featuring any two or more of the following characters: Avery, Snape, Rosier, Wilkes, Lestrange, and Lestrange. All eras up for grabs. If you're twisted, we could have Christmas with Avery, Snape, and the Lestranges some time during OotP. If you're a little nicer, we could have Christmas at Hogwarts or at someone's house with everyone alive. The possibilities are endless

The fic or ficlet must include:
The line: "I'm sick of green and silver."
"But isn't that a Muggle custom?"
and
a Christmas tree
a reference to "Hogwarts A History"
a cameo by Mad-Eye Moody (can be in flashback, if you like)

I'd love to find the group or site that hosted this, so I could read the other stories from it. Anyone know its origins?