Janine,
Where have you been looking for help for PG? I have found the PostgreSQL mailing lists extremely helpful. You often get responses straight from Tom Lane, Bruce Momjian, Peter Eisentreut, etc. and these are the people who _write_ PostgreSQL. Usually I get a response to a question in less than 2 hours.
Tom Lane's responses in particular, are usually very detailed and very accurate. A recent example of that was the experience of Jeff Davis and the GEQO optimization question. http://xarg.net/blog/one-entry?entry%5fid=19950
-Roberto
