A core point in SAS’ pitch for its new MPI (Message-Passing Interface) in-memory technology seems to be logistic regression is really important, and shared-nothing MPP doesn’t let you parallelize it. The Mahout/Hadoop folks also seem to despair of parallelizing logistic regression.
On the other hand, Aster Data said it had parallelized logistic regression a year ago. (Slides 6-7 from a mid-2010 Aster deck may be clearer.) I’m guessing Fuzzy Logix might make a similar claim, although I’m not really sure.