It has been a while since I last tried, but at one time I posted several questions to the PG mailing lists (don't recall which one) and didn't get any responses at all, or at least nothing helpful. It's been long enough that I don't recall exactly what happened.
I'm willing to believe the situation is better now, but I've got my resources lined up for Oracle so that's my comfort zone. Your mileage obviously varies. :)