The video is a screencast of RhNav - Rhizome Navigation visualizing the Blogosphere as a 3D graph using the technorati API. www.rafelsberger.at is used as a starting point.
C. Tantipathananandh, T. Berger-Wolf, und D. Kempe. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 717--726. New York, NY, USA, ACM, (2007)