  Neutralino proton cross sections are examined for models with R-parity
invariance with universal soft breaking (mSUGRA) models, nonuniversal SUGRA
models, and D-brane models. The region of parameter space where current dark
matter detectors are sensitive, i.e. $1\times 10^{-6}$ pb, is examined. For
mSUGRA models, detectors are sampling parts of the parametr space for tan$\beta
>\sim 25$. The nonuniversal models can achieve cross sections that are a factor
of 10-100 bigger or smaller then the universal one and in the former case
sample regions tan$\beta >\sim 4$. The D-brane models considered require
tan$\beta >\sim 15$. The inclusion of CP violating phases reduces the cross
section by a factor of $\sim$ 2-3 (but also requires considerable fine tuning
at the GUT scale). The expected particle spectra at accelerators are examined
and seen to differ for each model. Three new regions of possible coannihilation
are noted.
