Awesome video, Eric! What's new in 2.0 version?
Please forget about the old emNewton 1.0! That was really just a little "getting-warm-with-ICE" project, nothing serious.
emNewton2 is the most modern and well-coded of all my plugins so far. It features a newly designed multithreaded octree for the neighboring and spacial partioning (that is the "trick" to get fast calculations). Then it has the particle fusion (intersecting particles melt together into a bigger particle) as well as particle collision. In a certain sense emNewton2 is the "real version 1.0". By that I mean that it will be enhanced with new functionality in the future. There's already a quite nice list of things I will add (sorry, I cannot be more specific at the moment).
Certain things that were developed for this new plugin are also going to be included into some of the other plugins. For example emFlock2 will have collision in its next version.