Other
City Journal: Let's Break Up the Big Cities
This lengthy article offers many examples in its claim that smaller municipalities do a better job of governing and providing services than huge megacities.
PBS
Pbs: Journey to Planet Earth: Urban Explosion
From the "Journey to Planet Earth" series, PBS takes a look at the world's exploding urban population. Includes video clips and educational resources.
US Department of State
America.gov: Megalopolis
An excellent definition of a megalopolis. Begins with the creation of Megalopolis and delves into the dominant theme which is "Urban-ness." The "Changing Patterns in Megalopolis," are also discussed.