If you don't find it useful just delete it.
I think it would be useful if people tell which things he/she would like to learn, so if some other person know it, he/she can propose a new tutorial about that.
I'm interested in bump mapping, so if somebody can propose a tutorial about that I'll be grateful.
Also I think a large tutorial about different kinds of textures with each vmt code will be so useful. Different kind of shaders, water textures, blend textures, etc