According to the interview Andi Gutmans just did with Marcus Whitney of the Pro-PHP Podcast, there's some news coming soon from Zend about the Framework.

We are going to roll out much more information in February, and we realize it's a bit scarce on information, to be honest, we just had too much to do on the development side, to start rolling out bits and pieces of information.

So, February we're going to roll out more information, we're going to have the preview version where people can play around with it. [...] There's a lot of work that still has to be done there. We're going to be posting more information and launching a Zend Framework site, where we're going to have CVS, and you can see the source code, you can see the manual, and so on. We are going to publish a roadmap so that people know where we're heading.

For the rest of the interview and more informtion about the Zend Framework, you can check out this interview, and for all of the details on this "preview release" of the Zend Framework, keep an eye here - we'll let you know as soon as we know...