  We discuss the the GLV Reaction Operator formalism for computing the
non-abelian energy loss of jets propagating through hot and dense matter. We
incorporate our results on induced gluon bremsstrahlung together with the
effects of nuclear shadowing and multiple scattering in a two component
soft+hard description of heavy ion reactions at RHIC energies. We demonstrate
that good agreement between data and theory can be achieved in the measured
moderate p_T <= 5 GeV window at root(s)=130 AGeV and we extend our predictions
for the high p_T part of the hadronic spectra. We focus on the perspectives of
using jet tomographic methods for probing not only the density and geometry of
the quark-gluon plasma but also its parton composition at various center of
mass energies.
