Eric Mayes, writing in a comment on Cosmic Variance claims to have a paper coming out Monday that derives the MSSM from string theory, complete with lepton masses and neutrino mixing ratios (at least for known particles). Very exciting if true - especially if their derivation gives masses for particles not yet measured. I'm not sure what the status of the measurement of neutrino mixing ratios is.
We can now competely derive the MSSM from string theory, including the quark, tau lepton, and neutrino mass matrices and mixings (see our paper on Monday), so these people should sit down and be quiet.
I don't know if this is truly legit, but there does seem to be a real Eric Mayes at Texas A&M.
UPDATE: Via Wolfgang, the paper is here.