Tool to import/export Vertex Painting from Cinema4D

Hello everyone.
I don't work with Unity (yet, at least) but I knew from some people who do work with it that Unity is able to import fbx files that contain vertex painting information (does it import any other format that can include that information?).
I'm finishing a set of tools for Cinema4D that allow the creating of Vertex Painting inside Cinema4D.
Besides painting on meshes, rendering those meshes, as it is now, it can import .obj files that contain Vertex Painting information (generated in Zbrush or 3D Coat) and also export them.
Would it be useful for some of you if it would import and export Vertex Painting information in .fbx format too?
Anyone can check out the current state of the plugin here: