Interesting alert of MapBox by poster Yau: http://flowingdata.com/2013/06/20/mapping-twitter-demographics/ I just ordered the e-book version of Yau’s Data Points.
Here is MapBox: http://www.mapbox.com/blog/visualizing-3-billion-tweets/
Later today I found this related article in GigaOm by Ingram:
- Ingram, M. (2013, June 18). Taking the pulse of the planet: How Twitter erases geography. GigaOM. Retrieved June 21, 2013, from http://gigaom.com/2013/06/18/taking-the-pulse-of-the-planet-how-twitter-erases-geography/