1) Area Codes In Which Ludacris Claims to Have Hoes
There is a great write-up about this here.
2) Music Map of the United States
View big here.
Looks pretty good. However, I think they forgot Speed Garage somewhere in California.
3) Generic Names for Soft Drinks by County
I'm sure you've seen this, but it is pretty awesome. If there was a way to isolate my house, it would be skewed by my dad's use of "Pepsi" to refer to all soft drinks.
4) Prevalence of States Mentioned in Country-Music Lyrics
I was shocked there's no mention of New Hampshire in Country!
5) Percentage of Light Hair in Europe
This is mainly to challenge my wife's claim to Swedish ancestry.