Ye' old general discussion board. Basically, for everything that isn't covered elsewhere. Come here to shoot the breeze, shoot your mouth off, or whatever suits your fancy. This forum is not for asking programming related questions.
From what I've read so far, it doesn't seem to be geared towards actual web development technology... it's rather more of a guide to the logic behind the development process. But I'm sure they might mention their Ruby on Rails offering in there quite a bit.
Even if they do preach that, it's quite possible to apply the general concepts of their teachings to any language, and specifically PHP.
It is an excellent book. I actually bought the pdf a while ago (don't think the book was online then, but that doesn't matter). The whole "getting real" way of thinking might not be the thing for everyone or every situation, but reading it you get at least some good ideas about development.
Best book I've ever read on web development is "Building Scalable Web Sites" by Cal Henderson (of flickr fame). It will teach you in hours what it takes years to learn... the guy is a genius at cutting to the quick of any issue.
Unfortunately, it's not free, but it is worth every penny at any price!
Seriously, it taught me more than all my post-secondary schooling combined.
Oh, and since it's an O'Reilly book, you get an attractive pencil drawing of a carp on the cover as an added bonus.