World Map of Social Networks

Social networks fascinate me. And Facebook fascinates me. Here's an interesting map of online social networks from TechCrunch:
"World Map Of Social Networks Shows Facebook’s Ever-Increasing Dominance" by Robin Wauters
http://techcrunch.com/2010/12/10/world-map-of-social-networks-shows-facebooks-ever-increasing-dominance/

Notice that the site shows similar maps from the recent past, documenting Facebook's march to dominance.