Haven't had the chance to read it all but this is encouraging:
Daniel and Marty, the free Face Dancers
Daniel and Marty are two New Face Dancers, who by gathering enough memories and experiences of other people ("taking personas" as Daniel expresses it), became free individuals, masters of their own. For this reason Paul Wouters came up with the phrase 'Master Face Dancers'. Note that also the New Face Dancer that replaced Tuek in Heretics of Dune starts to act on his own, and was slipping out of control of the Bene Tleilax.
Didn't this guy "Joel "Phaedrus" Wolfe" post here already?