I noticed on the Oracle OLAP blog
[http://www.oracle.com/technology/products/bi/db/11g/pdf/comparision_aw_mv_11g_twp.pdf]
the other day that a new white paper on Cube Organized Materialized Views
[http://www.oracle.com/technology/products/bi/db/11g/pdf/comparision_aw_mv_11g_