  We provide an up-to-date analysis of the parameter space of the minimal
supergravity model (mSUGRA). Novel features include the new central value of
the top quark mass, an improved calculation of the masses of the supersymmetric
particles and the neutral Higgs bosons, constraints from b to s \ell^+ \ell^-
decays, and a careful treatment of the most important experimental and
theoretical uncertainties. In addition to the by now traditional plots of the
allowed region in the (m_0, m_{1/2}) plane, we show allowed regions in the
planes spanned by pairs of {\em physical} sparticle or Higgs boson masses.
Moreover, we search for the minimal allowed masses of new particles for various
sets of constraints. We find that in many cases the direct experimental limits
from collider and Dark Matter searches can be saturated even in this minimal
model, and even after including the by now quite restrictive constraint on the
Dark Matter relic density.
