This is a very basic example that doesn't really use any of D3's faciilties for working with geographic data at all. We are just making use the of fact that WikiMedia has a reasonable SVG map, that has all of the state paths labeled in a very sensible way.

In truth this is fairly un-D3ish, in that we don't even bind the data to any visual representations. We just iterate through the data and style the corresponding state path when we find it. To make this a little more interesting, I loaded all of the metrics into a popup menu so we could switch between the various metrics.