As mentioned on the Zend Developer Zone, there's a new tutorial from Christoph Dorn about combining the Zend Framework with the FirePHP debugging tool that now comes included in the latest release (ZF 1.6).

The long awaited day has arrived. Zend Framework 1.6 just shipped and with it native support for FirePHP! This means that if you use Zend Framework (ZF) you can now log to your Firebug Console via FirePHP without needing to download any other PHP files such as the FirePHPCore library.

The two new components - Zend_Log_Writer_Firebug and Zend_Db_Profiler_Firebug - are used in the debugging and his tutorial shows you how to get started.