This is how it went down:
Me: Pick a number between 1 and 331.
Me: Subtract 100
Me: Divide in half.
Me: What is half of 220?
Luke: Oh. 110
Me: Add 35
Me: Add 75
Me and Luke at the same time: Hey! Look, two 220's! That must be it then!
And so the winner is:
Alexandra Knittel of Germany. Check out her site, she makes beautiful collage art and more. Congrats Alexandra!
And thank you to everyone who participated - this was so fun, what a big small world we live in! So many wonderful comments, you all really know how to make a person feel good about their art. And so many wonderful gifts being given out, I couldn't get to them all, but I'm looking forward to next year!