  We re-examine the bounds on supersymmetric particle masses in light of the
new E821 data on the muon anomalous magnetic moment and the revised theoretical
calculations of its hadronic contributions. The current experimental excess is
either 1.5 sigma or 3.2 sigma depending on whether e+e- or tau-decay data are
used in the theoretical calculations for the leading order hadronic processes.
Neither result is compelling evidence for new physics. However, if one
interprets the excess as coming from supersymmetry, one can obtain upper mass
bounds on many of the particles of the minimal supersymmetric standard model
(MSSM). Within this framework we provide a general analysis of the lightest
masses as a function of the deviation so that future changes in either
experimental data or theoretical calculations can easily be translated into
upper bounds at the desired level of statistical significance. In addition, we
give specific bounds on sparticle masses in light of the latest experimental
and theoretical calculations for the MSSM with universal slepton masses, with
and without universal gaugino masses.
