After all the submissions are in, we'll pick the best hack for each of the two gaming systems, publish the write-ups on Engadget, and open them up to reader voting (by submitting your hack you're giving us the non-exclusive right to publish it on the site).
In this we see the genius of the entire book: Silver is able to appeal to those who are both mathematically and non-mathematically inclined, building a compelling story as to why both types of reader should be interested in the better quantification and understanding of the probability of the events that surround us every day.