On the main web site the General Information page at
http://www.postgresql.org/doxlist.html
lists a Guide at
http://www.postgresql.org/info.html
However that guide, under jdbc, doesn't mention the important Java driver
site for Postgres at
http://www.retep.org.uk/postgres
That site is mentioned under the link Linux PostgreSQL HowTo
http://metalab.unc.edu/LDP/HOWTO/PostgreSQL-HOWTO.html
I believe the reptep site should be under the Guide as well. It's of
interest to more than just Linux users.