  We review recent experimental progress in the domain of rare radiative,
semileptonic and leptonic B decays. The statistical precision attained for
these decays has reached a level where they start to impose meaningful
constraints on the Cabibbo-Kobayashi-Maskawa matrix, which are complementary to
those obtained from hadronic decays. While the current data indicate no
deviations from Standard Model predictions, there is still some room for new
physics in these decays.
