This site has some neat maps that highlight many aspects of our society. Seems to cover everything from politics, to sociology, and humorous.
http://strangemaps.wordpress.com/
I found the coke v. pop v. soda to reflect my personal experience, though I question some of the reasoning behind the sweet tea analysis. I am from the South originally and it would be odd to find a place that served only sweet tea and no unsweet tea at all.