Bing Health Maps is a new Bing Map App that provides statistical information for the entire United States by county to visualize healthy (and not-so-healthy) parts of the country to help you make healthier decisions. Bing Health Maps is very straightforward to use - (1) Select a state and, (2) Select a Community Health Indicator. The map will re-center on the respective state and color-code the counties within that state based on unit-based reporting. You can select health indicators such as Birth Indicators (low birth weight, premature births, births to women under 18, etc.); Death Measures (homicide, lung cancer, stroke, etc.) or Health Risk Factors (obesity, smokers, high blood pressure, etc.). If the opacity doesn't suit your fancy there's a slider to increase or decrease it. Once the map is loaded with the respective counties shaded you can click on any county to get all of the factors listed under the Community Health Indicator list all in one popup for that county.
More Info: Bing Health Maps