Seb made a great demo on PV3D “touchable” particles. He has released the source also, so you can find out how to do your own PV3D particle system and play with it.
Source | Papervision “billboard” particles
About the Author: Carlos Pinho
A father, a husband and a geek... Carlos was the founder of projects like The Tech Labs and Flash Enabled Blog. He is the founder of TekTuts He is passionate about technologies. Their main skills are in analytics, transport & logistics, business administration. He also writes about programming resources, trends, strategy and web development.