I guess since my project has already been referenced here, I might as well throw my hat into the ring in the official contest with my DIY block-printed trick-or-treat bag.
Contest Entry : Block Printed Halloween Treat Bag
What I would do differently: I really like the rustic look of using wood for block printing (instead of, say, linoleum), but I still think I would ink the block a bit more heavily next time.
Full project write up, including video, can be found here:
So, I'm in the contest.
Full disclosure - my wife and I made this project and video as part of a deal with Inventables in which they provided the machine to us for free. But the halloween theme and the project idea, etc, was ours and ours alone.