I swear, I get more senile every day.
I totally forgot that new registrants would have their messages held for approval — so Wonderduck was actually the third contestant to claim the poster! And I already declared him the winner and ordered the poster.
Well, stupid is as stupid does, but honor is another thing entirely. I therefore declare that we have THREE winners. M_earendil, thelenmyers, I’ll be contacting the two of you this evening for your snail mail addresses, and both of you will also receive posters. Least I can do, aside from the obvious apology for screwing up.