I think it's absolutely fascinating to see the way that language and dialect works -- particularly in a society as young and relatively-homogenous as the United States.

What stands out to you from this particular case study (discovered via 22 Words)?  I think it's really interesting to see the distribution of the greenish colors (people who use the word "soda") -- mostly on the coasts but also strangely, inexplicably, bunched up around St. Louis and eastern Wisconsin.  I'm also amazed by how sharply the ridge of the Appalachian mountains apparently serves to separate these preferences in dialect (clearly a geographic distinction) -- but then out west, the preferences change almost automatically across the Arizona - New Mexico border (where the distinction is clearly a man-made straight line across the map).  And somehow Alaska manages to run the gamut of preferences in dialect.

I always grew up calling these types of drinks "pop."  On the one hand, this makes sense based on where I grew up.  But on the other hand, there's nothing about this map that makes any sense at all.