According to this new post on the Zend Developer Zone, its parent company, Zend, has launched their Zend Product Online Documentation Center:
You know when you reach that point when you just don't remember where to configure your Zend Platform Events, how to set up your Tunneling, or what that Zend Core extension does? Well the documentation team at Zend have come up with a way to make all Zend product documentation as easily available as possible, so you can all benefit from our wisdom and experience.
The documentation center is a resource for all things Zendy - information on their products made searchable and easy to browse.