  In recent years the B-factories and other machines have found evidence for a
large number of new states with hidden charm: candidate h_c(1P), eta_c(2S), and
chi_{c2}(2P) states; the well-established X(3872); enhancements called X(3940),
Y(3940), and Y(4260); and a new structure at 4350 MeV. Various
conventional-charmonium and more exotic interpretations of these data have been
proposed. In this talk we review the current state of the experimental evidence
and the prospects for clarifying the spectrum.
