If you've seen Star Trek, you know the concept, but if you don't, it's basically a mirror universe where you have an evil double and their Earth and its history are the opposite of ours. There's a good summary here. So the idea we had was to write a Magnificent Seven fic with the mirror selves of the seven, either OW or ATF, or some other AU. There are all sorts of possibilities.
So the question is, would you like to read and/or write such fic? We'll figure out the logistics later if there seems to be interest :)
(And please feel free to pimp the poll out on your own LJs if you like the idea!)