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Sparticle landscapes in mSUGRA, in SUGRA models with nonuniversalities(NUSUGRA), and in D brane models are analyzed. The analysis exhibits theexistence of Higgs Mass Patterns (HPs) (for $\mu>0$) where the CP odd Higgscould be the next heavier particle beyond the LSP and sometimes even lighterthan the LSP. It is shown that the Higgs production cross sections from the HPsare typically the largest enhancing the prospects for their detection at theLHC. Indeed it is seen that the recent Higgs production limits from CDF/D\O\are beginning to put constraints on the HPs. It is also seen that the $B_s\to\mu^+\mu^-$ limits constrain the HPs more stringently. Predictions of the Higgsproduction cross sections for these patterns at the LHC are made. We computethe neutralino-proton cross sections $\sigma (\chi p)$ for dark matterexperiments and show that the largest $\sigma (\chi p)$ also arise from the HPsand further that the HPs and some of the other patterns are beginning to beconstrained by the most recent data from CDMS and from Xenon10 experiments.Finally, it is shown that the prospects are bright for the discovery of darkmatter with $\sigma(\chi p)$ in the range $10^{-44\pm .5}$cm$^2$ due to a"Wall" consisting of a copious number of parameter points in the CharginoPatterns (CPs) where the chargino is the NLSP. The Wall, which appears in allmodels considered (mSUGRA, NUSUGRA and D branes) and runs up to about a TeV inLSP mass, significantly enhances the chances for the observation of dark matterby SuperCDMS, ZEPLIN-MAX, or LUX experiments which are expected to achieve asensitivity of $10^{-45}$ cm$^2$ or more.

Light Higgses at the Tevatron and at the LHC and Observable Dark Matter in SUGRA and D Branes