Awsome to know that your reallly getting the hang of Mental Ray and SSS shaders. She still looks a bit waxy though, and the lighting looks a bit too intense. Are you using Ray traced shadows or D-Map shadows? I downloaded 2 of hi-end3d's skin shaders a while back and messed with them for a while, very cool stuff. The only problem for me is that just when I think I have it figured out, I find something else thats done differently. So in that respect , it doesn't hurt to learn several methods of doing it.

By the way, awsome rig. Are you using IK handles on her?