Foreclosures shown on heat map from TechCrunch
"If you want to see in stark colors exactly how the mortgage credit crisis is spreading across the country, go to real estate search site HotPads and look at the foreclosure heat maps in your area. These are map mashups that take foreclosure data from RealtyTrac and overlay them on a color-coded map. Red indicates a high rate of property foreclosures per capita, and blue indicates a low level. Since foreclosures are now hitting record rates, there is a lot of red on these maps...." TechCrunch