What version of PostgreSQL are you using?
I think newbies should be pushed a bit to use the latest versions, maybe with some advice on how to setup the apt sources (in debian/ubuntu) to get them.
How much memory will be available to PostgreSQL? How many connections will be made to PostgreSQL?
I also think Postgres newbies using PHP should be encouraged to use something like ligttpd/fastcgi instead of Apache. The fastcgi model permits use of very few database connections and working PHP processes since lighttpd handles all the slow transfers to the client asynchronously. You can do the same with two Apache instances, one serving static pages and acting as a proxy for the second Apache serving dynamic pages. With this setup, even low-end server setups (For our personal sites, a friend and I share a dedicated server with 256MB of RAM, which we rent for 20€ a month). This thing will never run 200 Apache processes, but we have no problem with lighttpd/php-fcgi and postgres.
