Farsthary, Blender's volu­metrics guru, has taken on a new project: Voxel sculpting. Don't get too excited as he's still in the early stages of his work and there's no code available. Still, it's a nice insight into a possible new feature for Blender. For more information on Voxel Sculpting, see the explanation provided by 3D-Coat. Farsthary writes:

I recently started to gather information and research in order to implement for Blender some system for Voxel sculpting, or free sculpting like 3D Coat has brought to light (though the term is nothing new). Currently I´m in very early stages so don´t expect to much for now, I just want to inform that I´m on the road and open to collaboration with other devs and of course any help from the community is always very appreciated and needed.