And there I was thinking that that stench was my wife's feet! It turns out all along that it was this rather nifty miniatures exchange that I've just done with my brother. I gave him some Ogre Maneaters and Firebelly, and in return I received: 10 Pestigors, 5 Plague Bearers, a Great Unclean One, and a Daemon Prince.
The GUO is quite an old sculpt now ('96) but it has enough character, so I think I should be able to do something interesting with it. As for the others, I've very happy. I'll base up all the daemons for 40k, while the pesties will fit nicely into my beastmen army.