Rob Allen has a quick update posted to the PHP in Action blog concerning the site's forum and errata sections.

Although I'm not posting here much at the moment, I am answering questions about my Zend Framework book in Manning's Author Online forums. [...] Also, I have started posting up the errata that we have found on the book's website. If something doesn't make sense, check there first!

Those forums are quite a busy place with topics about specific parts of chapters to more general Zend Framework questions.