The O'Reilly Radar offers an article on the New York Times' Mapping America website.
From the official NYT Mapping America site: "Browse local data from the Census Bureau's American Community Survey, based on samples from 2005 to 2009. Because these figures are based on samples, they are subject to a margin of error, particularly in places with a low population, and are best regarded as estimates."
The conclusion from the O'Reilly article: "By creating a tool that is easy to use, and that is true to the original data, the New York Times opened up a new range of possibilities. The census data is a cornerstone of social statistics and studies, but without proper tools it is difficult for most people to comprehend. This example taps into the power of visualization: it makes complex information simpler to understand."