Netezza told me a while ago that it planned to introduce MapReduce, and agreed yesterday this was no longer NDAed. Stephen Brobst of Teradata* let slip at XLDB that Teradata has MapReduce too, apparently implemented but not yet generally available.
I don’t have details in either case. Netezza and Teradata evidently aren’t taking MapReduce as seriously as Aster Data, or even Greenplum or Vertica. But MapReduce has become pretty much of a “checkmark” item for large-database analytic DBMS vendors even so.
*Technically, Brobst is not and never has been a Teradata employee — but he’s widely and correctly regarded as being “of Teradata” even so.