  We present the first complete results for the semileptonic and rare radiative
form factors of B-mesons weak decay into a light vector-meson (rho, omega, K*,
phi) in the light-cone sum-rule approach. The calculation includes radiative
corrections, higher-twist corrections and SU(3)-breaking effects. The
theoretical uncertainty is investigated in detail. A simple parametrization of
the form factors is given in terms of three parameters each. We find that the
form factors observe several relations inspired by heavy-quark symmetry.
