Stencil Shadowing (Transparent Binary Textures)

[Phorem]

I did do a search first but i cannot see to find any information (other than what was on the Yo Frankie blog) about a "new" stencil shader that will allow binary textures to produce shadows based on the image - not the mesh (a square mesh for tree branches).
Did this (or did it) make it into the 1.4 release or is it only available via SVN? Was it only a one off for this particular use and never left the developers machine?

Any help would be great.
Adam.