I probably miss something, but it looks like this rhino translator is a joke. To import .3dm inside modo, you have to 'bake' the Rhino model to a polygonal mesh ... so what's the difference of just using .obj format ? In the other hand Rhino can import .obj or even .lwo as well ... so what's the point.

Btw Modo it's the most unstable peace of software I ever work with ... I like it a lot, but still ... so I prefer that MoI stays away from this Nexus stuff :P