Ducking out of LJ-vacation for a minute to reply (and also to be very happy over seeing you come over to the Who side).

http://www.whofic.com/ has a whole range of stories, gen, het, slash.

You can get the slashfic here: dw_slash. There are not nearly enough threesomes in this fandom, but that will change....

And also, I would be very happy if we could meet up some evening this week. Are you free, and what days work best? I was thinking KoH (I think it's still playing) and Pizza Hut.