the Sock knitter's anonymous group, had the challenge to knit socks in black, white, or black and white. There was also a mystery sock but i didn't feel as inspired to make it. It involved beads, and I am not sure how I feel about beads in socks.
I did however decide that I wanted to make Boo! toe-up socks, and include it in the Halloween sock KAL as well. I made them in Cascade heritage sock yarn in the natural color way. I probably made them a little shorter than normal, but I really like them.