PostgreSQL links

Main site
http://www.postgresql.org

Resources
http://www.postgresql.org/community/resources

PostgreSQL Conversion Documentation
http://www.postgresql.org/docs/techdocs.3

Comparison of different SQL implementations (PostgreSQL, DB2, MSSQL, MySQL, Oracle)
http://troels.arvin.dk/db/rdbms/

Commercial distro of PostgreSQL
http://www.enterprisedb.com

Forum (The Scripts) PostgreSQL
http://www.thescripts.com/forum/forum59.html