My buddy Steve, who was at turducken, sent me this link. It's an article from the UK's Daily Mail about a chef that took 12 Christmas fowl and made a whole different multi-bird roast.
The beast contains: turkey, goose, chicken, pheasant, partridge, pigeon squab, Aylesbury duck, Barbary duck, poussin, guinea fowl, mallard-and quail with herb and fruit stuffings. It can serve 125 people, contains 50,000 calories and takes eight hours to cook. Anne Petch, a farmer who created the beast, made a fruit stuffing to go into the roast. Next years she wants to do a 21-bird roast.
I'm just kind of blown away. The turducken wikipedia entry is interesting and alludes to this type of thing, but I hadn't really seen it before. After you click on the link be sure to scroll down and check out the photos.