Interative map of suburbs

With some regularity I find myself getting calls from people looking for an official map/dataset describing the edge of suburbia. Is it a detailed distinction that shows Morristown as a city compared to Morris Plains as suburbs? Or is a sweeping blob that begins and the Husdon River and reaches out through much of the Highlands? While there is nothing official, a new interactive map from RCLCO offers one fairly detailed interpretation of these boundaries. Perhaps most interesting is the group of classifications that they propose for describing these incredibly complex places.