From our sister site, AjaxDeveloper.org today, there's this new post talking about a new Ajax/PHP5 framework that's being offered - Zephyr.

Zephyr is an ajax based framework for PHP5 developers. You can easily develop business applications using this robust framework. This is extremely easy to learn and very simple to implement. You can deliver a full fledged Ajax application with strong business layer in backend within some minutes. installation and deployment of packages that you develop for zephyr is hassle free.

Moreover you will get all the features of most popular templating engine "smarty" and powerful data access layer "ADOdb".

Their page gives complete documentation and examples for the framework, making it easy to get started. And, of course, the obligatory "Hello World" app is there too...