I'm not sure if i'm remembering correctly here , but from some video conference of shaders or something i saw some time ago , i remember they were on this topic , and discribed how light goes through the skin and so on , they were talking about how they can fake that , i cant recall the shader they used , but the big trick was just to blur out one of the maps , maybe the specular map or something , cant recall atm , but it wasnt real sss , still looked good though , i have the disc somewhere , maybe i'll look for it tomorrow see what technique they were using.