some stats re: MLS stadia...
"of 29 teams, including St. Louis and Sacramento, only 9 have (or will have) a stadium located downtown and near rail transit.
Chicago, Atlanta, NYC, Toronto, Houston, Portland, Seattle, Vancouver, St. Louis."
Apparently a lot of earlier teams went with badly sited/non-urban stadiums...obviously if a region doesn't have rail transit then there's not much that can be done. the kc location is just plain horrific, though...obviously something big is being done about chicago. cincy will have a central city stadium, nashvilles situation is...not great.
photoshelter.com