Man, the papervision api keeps changing so rapidly, I should get frequent flier miles on my tortoiseSVN for all the downloads. It’s getting hard to keep up.
In any case, though, I just had to play with the particle updates made to both the Great White and Effects branches on Feb 10. To do what I wanted (turn an image into interactive particles), I had to make a few minor alterations to the org.papervision3d.materials.special.MovieAssetParticleMaterial class, but below is what I came up with (particle motion brought to you by Tweener). Fun stuff.