Although I know there are toon shaders available in maya software renderer now. I was trying to do it based on this same tutorial just for theoretical reasons. However, the condition node seams to effect the UVs somehow.

If I connect a ramp shader directly to a surface shader, the toon shading looks correct (minus the black outlines). But once it goes through the condition node it gets applied wrong (both on the preview sphere and the objects it is attached too). I have the ramp outColor going into condition1.colorIfFalse. colorIfTrue is set to black and a samplerInfo.facingRatio into first term. The black outline shows up correctly.

This is Maya 7.0.