I wrote a new demo for some recent research on the perception of biological motion. We found that the human visual system can very effectively perceive and encode a group of moving figures without having to serially inspect each one.

Check out the Ensemble Biological Motion Demo

On the implementation side, using VBOs instead of packing the points into textures resulted in massively redundant data (some values need two copies for each frame of motion). VTF would have significantly simplified the implementation. Luckily, the Angle Project has it implemented, and the canary build of Chromium/Chrome (version 13) has integrated the changes; Firefox should have it eventually as well. I give it 3-6 months before public release versions have it as well.