TKG, yes and no, the CG compiler toolkit from nvidia will be integrated into the main engine, NGM will provide a scripting interface for your shaders, also we already have GLSL, please check the EDC i have a demonstration game up, there are also tutorials and docuemntations on shaders that can be found on the Wiki
Right now I am focused on graphics systems, finishing Box2D and merging these network functions as well as helping Spirit with NGM before worrying about integration of the CG toolkit.