MapReduce and PostgreSQL

Yesterday I was informed about AsterDB (asterdata.com), also PostgreSQL based (?, rumours from Neil Conway) commercial database, which implemented MapReduce technology inside PostgreSQL. Another one, is the Greenplum database (PostgreSQL + MPP), see http://www.greenplum.com/resources/mapreduce/ for details.

A half of year ago I also thought about MapReduce as a possible way to speedup building of inverted index in the PostgreSQL.

DBMS2 has a post for MapReduce and SQL - http://www.dbms2.com/2008/08/26/why-mapreduce-matters-to-sql-data-warehousing/