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We examine the prospects for supersymmetry discovery in the minimalsupergravity (mSUGRA) model via indirect detection of neutralino dark matter.We investigate rates for muon detection in neutrino telescopes, and detectionof photons, positrons and anti-protons by balloon and space based experiments.We compare the discovery reach in these channels with the reach for directdetection of dark matter, and also with the reach of collider experiments suchas Fermilab Tevatron, CERN LHC and a $\sqrt{s}=0.5-1$ TeV linear $e^+e^-$collider. We pay particular attention to regions of model parameter space inaccord with recent WMAP results on the dark matter density of the universe. Wefind that the IceCube neutrino telescope as well as 3rd generation direct darkmatter detection experiments should be able to cover the {\it entire} WMAPallowed portion of the hyperbolic branch/focus point (HB/FP) region ofparameter space. This is in contrast to the case of the CERN LHC or a linear$e^+e^-$ collider, where only a fraction of the HB/FP region can be accessed.In addition, we show that detection of $\gamma$s, $e^+$s and $\bar{p}$s shouldoccur in much of the HB/FP region, as well as in the low $m_{1/2}$ portion ofthe $A$ annihilation funnel, and will be complementary to searches viacolliders in these regions.Comment: 23 pages including 7 EPS figures; revised version in accord with  published version with updated reach plot

Indirect, direct and collider detection of neutralino dark matter in the minimal supergravity model