Hi Shaun.

@You : "...I realize it would be a ton of work, but this would be awesome to integrate into MOI..."

I think that for all these kind of things, instead of adding complexity to a Nurbs based system like Moi or Rhino,
it could be much more easy and fast using one of the numerous free Poly/SDS modelers actually available (Blender, NVIL, etc...)

With Poly/SDS it's much easier not only creating but, and above all, apply further modification to that kind of models.

Or even, investigate the possible use of some Voxel sculpting tool...(3D-Coat, ZB, etc...)

But, this is only my very personal opinion.

Bye.

Marco (mkdm)