This is a test of Blender 2.5′s Composition Nodes, to see how they differ from the 2.49a release. I saw the incredible music video ‘Particle Garden‘ by David Tilman that he created in Blender, and gave away the source files. Taking a peak through those, he uses a mesh with dupliverts to map the spheres, and animates the camera and the displace modifier to create a beautiful flythrough.
He also made extensive use of the Composition Nodes available, namely RGB, Defocus and Glare. The source .blend file is available below.