  The high energy/density QCD has been widely used for DIS phenomenology with a
projectile particle considered as perturbative and dilute.
  We review some recent attempts to derive a high energy evolution kernel which
treats targets and projectiles in a symmetric manner. From theoretical point of
view the problem is tightly related to inclusion of Pomeron loops in the
evolution. The ultimate goal is to consider high energy scatterings with both
projectile and target being dense, the situation faced at RHIC and the LHC.
