  This paper describes recent preliminary results from the CLEO-c experiment
using an initial ~60 pb^-1 sample of data collected in e^+e^- collisions at a
center of mass energy around the mass of the psi(3770). A first measurement of
the branching fraction BR(D^+ -> mu^+ nu) = (3.5 +/- 1.4 +/- 0.6)x 10^-4 and
the corresponding decay constant f_D = (202 +/- 41 +/- 17) MeV has been made.
Several charged and neutral D meson absolute exclusive semileptonic branching
fractions have been measured, including first measurements of the branching
fractions BR(D^0 -> rho^-e^+ nu) = (0.19 +/- 0.04 +/- 0.02)% and BR(D^+ ->
omega e^+ nu) = (0.17 +/- 0.006 +/- 0.01)%. Estimated uncertainties for
inclusive D semileptonic decay modes are also presented. Fits to single and
double D tagged events are used to extract absolute branching fractions of
several hadronic D decay modes and DDbar production cross sections. Most of
these results from this small preliminary sample are already of greater
sensitivity than previously published results.
