1520 posts were made in the contest period, with the post ID range of 272871 to 274391. (If you want to know what your personal odds were: divide 1520 by the number of posts you made. Your odds were one in whatever number you come up with.)
We used the True Random Number Generator at
RANDOM.ORG - True Random Number Service to choose the winning four post ID's from that range. It spat out the following:
Winners: please send me a PM with your snail mail details to claim your prizes.
Congratulations & thanks to everyone for taking part, especially Linear Logic for providing the big prizes!