ForCG has a nice collection of particle flow animation videos. Most of them are just whispy shapes with an amazingly relaxing effect, but a few show merging particle effects with video inputs or models of things like the sun.
Randall Hand
Randall Hand is a computer graphics programmer and news junky that's been working in the field for the last 15 years. He's responsible for visualizations generated on some of the most powerful supercomputers in the world, ytnef, mullion support in ParaView, and VizWorld.com.