Vertex color support in OBJ format

I'd love to see support for vertex colors in OBJ import / export. ZBrush includes vertex colors in its OBJ export, and it would be great if Blender could read those vertex colors, avoiding having to use the FBX exporter plug-in to get Polypaint from ZBrush into Blender.

3D-Coat supports the OBJ format that includes vertex colors.

Thanks.