Twitter City Maps
See different maps of cities drawn by twitter links like this Map of San Francisco
Category: Social network
Degree centrality and variation in tie weights
A nice and simple method to take into account both weights and dispersion of ties: by Tore Opsal Method and examples
Physical proximity plays a big role in terms of building relationships
http://www.nytimes.com/2011/06/05/technology/05ping.html?_r=2 Grubwithus Organizes Dinners – Social, Minus Media – NYTimes.com, june 4th 2011
Your movements tracked by your IPhone
if you want your own movement (available on your MAC), download the application