<a href='http://www.php.net/downloads.php' >PHP 5 Beta 1</a> has been released. There are an absolute ton of changes and improvements, and the <a href='http://www.php.net/ChangeLog-5.php' >changelog</a> has all the details. Perhaps even more interesting are the <a href='http://www.php.net/zend-engine-2.php' >added language features</a> offered by the new engine from <a href='http://www.zend.com' >Zend</a>. Enjoy.