I just sent a few rails of the DC suburb area. I didn't send anything too amazing, just some basic spots so anyone in the area can get started. Everyone should just follow this model, no need to post your secret spots, just the basic DFD's and such that can be found anywhere to help some people out.
Also, consider adding a simple page of basic urban etiquette. It is important, but some basic knowledge of how and why we must act respectfully can make a difference. It's not like its a massive community of snow people who are looking to hit urban, especially in the midwest and parts of the EC, so I don't think we need to worry that much about randoms showing up and blowing up our spot.
One more possibility would be to include the email of whoever submitted the spot as a kind of local representative, incase someone needs to borrow a drop in, or needs a guide. This would also ensure that the spots would be treated correctly and the contributors would get some respect.