I think what you want to do, if I understand right, is to take a samplerInfoNode, pipe the camera facing ratio into the V coord of a black-to-white V ramp, and have that control your shading. Yes?
Depending on what you hook the ramp up to (color/diffuse versus incandescence/ambient/whatever), it will be affected by lighting, or not.
I can’t look at Francesca’s file, since I only have Maya 6, not 7, and she made it a .mb file, but it looks like that’s basically what she’s doing, with a couple add-ons. She’s added a setRange node, presumably to control falloff of those values, so you could, say, bloom out into white easier. She also has a blendColors node in place of the ramp, which could work better if you wanted to blend between two shading networks depending on the facing ratio.