Not that I know off for the first. Yes for the second. High scale supersymmetry has interesting phenomenology. It helps with Leptogenesis, as well as inflationary and GUT scale model building. However the dark matter candidate (the LSP with R parity) must necessarily be relatively light to avoid overproduction in the early universe and so there will be a large hierarchy between that mass and the natural mass of the other superpartners. Scenarios like that have been explored quite a bit recently. Alternatively you also have models with mid scale supersymmetry (with superpartners at around the 100s or 1000s of TEV) and these naturally also provide a dark matter candidate without finetuning (the mass of the Higgs of course will be tuned at the 10^5-10^6 level). That's called split supersymmetry.