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.
U. Brandes, and T. Willhalm. Proceedings of the symposium on Data Visualisation 2002, page 159--ff. Aire-la-Ville, Switzerland, Switzerland, Eurographics Association, (2002)
U. Brandes, and S. Corman. INFOVIS '02: Proceedings of the IEEE Symposium on Information Visualization
(InfoVis'02), page 145. IEEE Computer Society, (2002)