CGNetworks posted a short blurb announcing SensAble Technologies new ClayTools system for 3DS Max. And there appears to be a Rhino3D version as well as a prototype for Maya (so this is what they wanted me to test for them). Looks promising.
The ClayTools system v1.0 supports 3DS Max releases 6 and 7 and will retail for US$2,795. For more information head over to the SensAble website.