I think it would be more interesting if the radius was variable and dependent upon the population density of your area. This way, your neighborhood in the city

I think it would be more interesting if the radius was variable and dependent upon the population density of your area. This way, your neighborhood in the city (SF) is roughly a kilometer out, but in Wyoming, you're going to talk to a relatively similar number of people. I think anyways it would be more useful for the kinds of tasks I would see myself using this app for.