As we mentioned in a previous article, RECURSIVE queries, often referred to in SQL ANSI specs and by DB2 and SQL Server as
Common Table Expressions (CTE) will make it into the 8.4 release and can already be found in the dev source. Technically CTE is a
superset and RECURSIVE queries are a subclass of CTE. Looks like basic windowing functionality will make it in 8.4 as well.
A summary of where your favorite patches are at can be found at the September 2008 PostgreSQL 8.4 commit-fest summary page http://wiki.postgresql.org/wiki/CommitFest:2008-09.
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