There is no wiki page yet, but that will change soon. For now you can see how to use it in the ParticleControllerTest. The result of that looks like this:
Beautiful! Feel free to grab the editor from below, try it yourself and share your effects!
It did not only contain the 3D particle engine itself though, but even an editor to create and preview different particle effects. A runnable JAR file of the editor called Flame can be downloaded here. It can either be run via a double-click on the file in most operating systems, or on the command-line via the following:
java -jar flame.jar
Here you can see a screenshot of it in action: