This video clip shows Hans Rosling, a Swedish public health expert, introducing a new data visualisation tool his foundation has worked on. Some of the issues he covers are brilliant, and it really does get across to me the importance of being able to manipulate data in tactile ways. Quite how we get from that to visualisation of networks, pff, who can say?

Got this from Crooked Timber which links to a nice quick Youtube vij of Gapminder too.