i remember there being a rock group who sent out stickers for one of their singles and ran a competition getting people to take photos of the sticker in the most interesting place.
perhaps you can get people to mail you a stamped-addressed-evelope and send them 20 or so back, and then see what happens. maybe set up a website for the best ones. it could be a really cool cult experimental art project. quickly go register www.july31st2006.com
find someone with a business opening on that day...
maybe a night club or something.