  In the last years, the CLEO III experiment has recorded a large collection of
data sets at the Y(1S), Y(2S), Y(3S) and psi(2S) resonances. Preliminary
results of studies of these data sets are shown here, which include the
observation of a new Y(1D) state, as well as several hadronic and radiative
transitions of Y and psi(2S) states. In addition, precision branching ratio
measurements of charmonium and bottomonium states and recent developments
involving the eta_c(2S) and X(3872) states are presented.
