Some interesting PostgreSQL-related links which have come my way this week:

• Wikipedia has a overview of different relational database systems in table form. It's not particularly detailed but provides a useful "at-a-glance" comparision:
  http://en.wikipedia.org/wiki/Comparison_of_relational_database_management_systems
• "Datamining Apache Logs with PostgreSQL": Article by Robert Bernier at OnLAMP.com:
  http://www.onlamp.com/pub/a/onlamp/2005/03/03/pg_datamining.html
• Benchw Results for PostgreSQL, Firebird and MySQL:
  http://benchw.sourceforge.net/benchw_results_open3.html