Here is the list of 3D Voronoi tutorials that I have gathered from the website for the class ARC.
http://explodebreps.wordpress.com/grasshopper-definitions/3d-warped-voronoi/
http://dimitrie.wordpress.com/2009/04/15/delaunay-triangulation-in-grasshopper/
http://dimitrie.wordpress.com/2009/05/01/3d-voronoi-in-grasshopper/
http://object-e.net/uncategorized/algorithmicbody
http://www.grasshopper3d.com/forum/topics/skeletal-mesh?commentId=2985220%3AComment%3A567188
http://dimitrie.wordpress.com/2009/04/30/qhullghlove/
http://parametric-design.blogspot.com/2013/02/voronoi-3dsplit-listrandome-reduce.html
http://www.grasshopper3d.com/forum/topics/skeletal-mesh?commentId=2985220%3AComment%3A567188