I don't know if anyone is interested in such a thing, but I'm signed up at http://homestuck-xmas.livejournal.com/ and I think it's going to be fun? The sign-ups end on Friday and I thought it might be relevant to interests. They're trying to get more people to sign up so if you wanna, you should do that.
There is also a thing about it on Tumblr if you would prefer, but I am dumb with Tumblr, but here is for people who are not dumb at it: http://homestuck-secretsanta.tumblr.com/