An example video for an article/how-to on my blog: http://andy.moonbase.net
Apologies for the quality. This was rendered at 2k and Vimeo chewed it up. I'll output a version with better compression and replace as I write the next part of the tutorial.
A simple simulation is used as a basis for a postsim ICE tree, as center points for additional particles and strands which are offset to create concentric rings.