  We analyze the implications of several recent cosmological and experimental
measurements for the mass spectra of the Constrained MSSM (CMSSM). We compute
the relic abundance of the neutralino and compare the new cosmologically
expected and excluded mass ranges with those ruled out by the final LEP bounds
on the lightest chargino and Higgs masses, with those excluded by current
experimental values of $\br(B\to X_s \gamma)$, and with those favored by the
recent measurement of the anomalous magnetic moment of the muon. We find that
for $tan\beta\lsim 45$ there remains relatively little room for the mass
spectra to be consistent with the interplay of the several constraints. On the
other hand, at larger values of $tan\beta\$ the decreasing mass of the
pseudoscalar Higgs gives rise to a wide resonance in the neutralino WIMP
pair-annihilation, whose position depends on the ratio of top and bottom quark
masses. As a consequence, the cosmologically expected regions consistent with
other constraints often grow significantly and generally shift towards
superpartner masses in the $\tev$ range.
