I just had an idea: in order to reduce noise (which also has the added affect of increasing DR) I was thinking it would be possible to utilise the high frame rate of the chip to average a series of frames (this should eradicate a lot of temporal noise) - and express this as a reduced ISO.
Alex at ML seemed to suggest this at one time - but I thought it was worh bringing up again, in terms of expressing it formally as reduced ISO in the camera.