For everyone that hasn't see the release - a new book by Andi Gutmans, Stig Bakken, and Derkick Rethans has been relsaed - PHP 5 Power Programming.

According to the official description it is a book "written by the authors of the actual PHP code! The authoritative developer's guide to mastering advanced PHP 5 techniques. FREE access to a 90 day FULL version of the Zend Studio IDE. Coverage of PHP 5's hottest new features, including OOP, Design Patterns, XML/SOAP integration PLUS expert chapters on PHP 5 Performance Tuning and PEAR. [...] This book covers the key topics that developers familiar with basic PHP syntax need to master to become fully productive and effective with PHP 5. These topics include customizing PHP through writing PHP extensions, object-oriented PHP programming, using and building PEAR components, PHP shell scripting, and XML with PHP. Simply put- Readers will understand how to extend PHP to meet the needs of any development project, no matter how complex."

It looks like a great book (nice and thick too) and with those three authors heading up the writing, I know it will be a wonderful resource for those looking to move into the PHP 5 world.