The New York Times has a very nicely done election map this year. Amongst its four viewing options is a depiction of counties that voted more Democratic (blue) or Republican (red) in comparison to the 2004 presidential election:
The blue is to be expected, given that the size of the win for Obama, but the red pattern is quite striking.
Also note the shift for candidate home states, in Arizona with McCain on the ticket, and what appears to be the reverse result in parts of Massachusetts, with Kerry no longer on the ticket. (The shift to the Democrats in Indiana is also amazing: without looking at the map closely enough I had assumed that area to be Obama’s home of Illinois.)
I recommend checking out the actual application on the Times site, the interaction lacks some of the annoying ticks that can be found in some of their other work (irritating rollovers that get in the way, worthless zooming, and silly transition animations). It’s useful and succinct, just like an infographic should be. Or just the way Mom used to make. Or whatever.