Pete Draper has made an 11-part tutorial on creating a tornado using Particle Flow in 3ds Max.
WeightPro for 3ds Max
WeightPro is a 3ds Max plugin for automatic, fast and smooth Skin modifier weighting, regardless of mesh topology.
Evermotion - Making of The Weed Way
Evermotion goes behind the scenes on Yones Bana's image The Weed Way.
Itoo Software have just released RailClone 2.1, focused on style editor optimization, and faster 3ds Max integration.