  We develop a quantum duality principle for coisotropic subgroups of a
(formal) Poisson group and its dual: namely, starting from a quantum
coisotropic subgroup (for a quantization of a given Poisson group) we provide
functorial recipes to produce quantizations of the dual coisotropic subgroup
(in the dual formal Poisson group). By the natural link between subgroups and
homogeneous spaces, we argue a quantum duality principle for Poisson
homogeneous spaces which are Poisson quotients, i.e. have at least one
zero-dimensional symplectic leaf.
  Only bare results are presented, while detailed proofs can be found in
math.QA/0412465, or in the reference [3]. The last section contains new,
unpublished material about examples and applications, which is not included in
math.QA/0412465 (nor in its printed version).
