I'm working on a piece, and researching this myself:
(thx so much for the ZB link BTW)
Currently this is my pool of resources:
Centered around 3DS Max's Mental Ray SSS Fast Skin Shader
Alex Alvarez has a REALLY good one:
Very interesting forum that answers many of the finer nuances (and I believe the guy who wrote Mental Ray frequents that forum):
Notably this PDF:
Something I would suggest trying out, is starting out with a simple sphere, and putting EVERY variable to either Black or 0mm.
Then just build up every layer individually so you get a better sense of what each layer does, and how it reacts.
(I've spent the better part of this last week working on it with my old dude, and it's still not together for me