I thought this map in the National Geographic was cool- it shows the most popular surname in different areas of the country. I am not sure what geographic divisions they use (why does Texas have so little granularity?). But it does turn out there are a couple of "Meyer" labels on the chart, which kind of surprised me -- though they did spell it the right damn way - no "s" on the end, no Mayer, no Myer or other such nonsense ;=)
The "Meyer" in the middle of Iowa is pretty much where my dad's family settled when they came over from Northern Germany. Though I am confused as to why they show it color-coded as English origin -- I am pretty sure this area is German (the Meyer over around northern Nebraska and in Wisconsin is coded German).