One of the creators of Rhino has made a 3D Modeling program called Moment of Inspiration. It is a CAD/Design Modeling program that is designed to work well with a pen & tablet as well as a mouse. It is available as a free beta and seems to be fully functioning. I have tried it and it works well. manipulated a few solids and tried it's boolian functions. It will loft nurbs, etc. It doesn't save out to VRML but does save to 3ds and obj, so a converter like Crossroads or Accutrans will work well with it. I have done a conversion out of it to VRML. Might be worth checking out.