All good ideas, casscorridor. From what I am reading, land use patterns in the 21st century will mean that some of our current urban infrastructure in places like Detroit will revert to greenspace.

I also find fryar's upside-down dense "T" of the city compelling. I'm in the Detroit housing market and looking to buy within the next six months to one year, and everything I'm interested in is within that "T". I figure there is long-term potential within those areas.