To kick things off, here are some arbitrary speculations about how to match all this data.
For the positron excess, I shall assume a supersymmetrized version of "A Theory of Dark Matter". i.e. MSSM + a new dark sector.
For the 130 GeV gamma-ray line, we could try a higgsino LSP with a mass mysteriously close to that of the Higgs.
And for CDMS's 8 GeV particle... how about a right-handed neutrino? There are right-handed neutrinos with O(10 GeV) mass in the "neutrino minimal standard model".
Having started with that combination of ideas, a serious model-builder would then sit down privately and see if that combination is even possible. But for now I'll just put it out there, and add comments as they occur to me.
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