While this is a cool product and great idea for a fundraiser, it's against the rules to sell these in the competition area. From the 2005 Champtionship
site info, section 31.5:
31.5 Site Restrictions
Please read the following restrictions and adhere to them in order to promote an orderly, safe, pleasant, and exciting competition. As a group, we all should honor agreements with the venue and help promote the spirit of good partnership.
Please:
Do not sell any products. This includes food, hats, shirts, or any promotional products.
I think even by taking orders now, the exchange of money for product at the event constitutes the sale itself, and would most likely not be allowed.