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.
What else is there to say? This code is available under the gpl, so follow those terms. Send back improvements, extensions, and contributions to code@creativesynthesis.net. Otherwise start by modifying the simple.xml file and using this html page.