  We introduce and discuss certain kinetic models of (continuous) opinion
formation involving both exchange of opinion between individual agents and
diffusion of information. We show conditions which ensure that the kinetic
model reaches non trivial stationary states in case of lack of diffusion in
correspondence of some opinion point. Analytical results are then obtained by
considering a suitable asymptotic limit of the model yielding a Fokker-Planck
equation for the distribution of opinion among individuals.
