hi Mark!
I can send you the SSS material if you want? (tiz the Mark from Thea right?)
if I remember right absorption is 100% white, scattering 240,240,240.. the values where .08 and .04 or half the absorption value for scattering, refraction is 1.000, then you just put it on a cube, light sources need to shine through it, you get no effect if the light is inside the cube, sun works better, its lighting fast, it works with unbias IR, but GM is still better if you want in scene lights to effect the medium
the SSS way messes up backgrounds so its only useful if you can't see the skyline for exteriors

hope that helps, I should be back properly this weekend
take care
Nige

oh.. no I never finished it, I fecked up the model :s