All,
Two articles which are somewhat late but provide very good coverage:
http://www.linux.com/news/enterprise/biz-enterprise/367073-five-enterprise-features-in-postgresql-9http://www.computerworld.com.au/article/360561/postgresql_9_0_release_takes_cloud-scale_workloads/
-- -- Josh Berkus PostgreSQL Experts Inc. http://www.pgexperts.com