To add a shop, just search for the zipcode it's in, then when it says "If you would like to add a shop that isn't listed below, click here." click on the link. You should then be able to fill in the info and hit submit. To add a comment to a shop, just find it (search for the zipcode it's in or a zipcode near it) and fill in the "add a comment" box. Hit submit and you're done.

If anyone has any questions, feel free to drop me an email (mcfa0086@tc.umn.edu) or a pm (or post here). It'd be slick if more people used it...