By popular demand, here are the challenge files along with the rules that we used for the Developer Cup. Feel free to download them and give them a try. You can also time yourself starting the clock after you read the rules for each challenge and see how long it takes you.
Also included are the steps that our judges took to see if the contestants passed each challenge. Use this to grade yourself after you've finished.
Hope everyone enjoys this.
Your Developer Cup Chairman
My solutions have been added. These are definitely not the only way of solving these problems, but this is how I would have done them. If anyone else wants to post better techniques than the ones I use, I would love to see them.