* Version numbers
    configure.in and configure
    update version and perhaps majorversion in doc/src/sgml/version.sgml
    bump interface version numbers
      update src/interfaces/libpq/libpq.rc
      update src/include/pg_config.h.win32

* Release notes
    update HISTORY and later doc/src/sgml/release.sgml 

* Documentation
    document all new features
    update help output from inside the programs
    /ref manual pages

* Ports
    update ports list in doc/src/sgml/installation.sgml 
    platform-specific FAQ's, if needed

* Miscellaneous files
    doc/bug.template

* Update pg_upgrade to handle new version, or disable

* Update copyright year?