Just a thought: it sounds like this Zend Framework is not so much a "complete system" like many of the existing PHP frameworks, but rather it is a collection of small, self-contained classes to abstract some common Web site development gruntwork. If that is the case, then I submit to you that it could be possible to build more elaborate, "site-in-a-box" frameworks on top of the Zend Framework. That would be cool. The flip side to this is that this framework is starting to sound a bit like a competitor to some PEAR classes, which I suspected from the get-go. I wonder how that idea sits with people?