It looks like the 1.8.0 version of the Zend Framework was tagged today in the SVN repo: http://framework.zend.com/svn/framework/standard/tags/release-1.8.0/
Here is the the content of the README.txt:
Welcome to the Zend Framework 1.8 Release! RELEASE INFORMATION --------------- Zend Framework 1.8 Release (revision 15226). Released on April 30, 2009 NEW FEATURES ------------ * Zend_Tool, contributed by Ralph Schindler * Zend_Application, contributed by Ben Scholzen and Matthew Weier O'Phinney * Zend_Loader_Autoloader and Zend_Loader_Autoloader_Resource, contributed by Matthew Weier O'Phinney * Zend_Navigation, contributed by Robin Skoglund * Zend_CodeGenerator, by Ralph Schindler * Zend_Reflection, Ralph Schindler and Matthew Weier O'Phinney * Zend Server backend for Zend_Cache, contributed by Alexander Veremyev * Zend_Service_Amazon_Ec2, contributed by Jon Whitcraft * Zend_Service_Amazon_S3, Justin Plock and Stas Malyshev * Zend_Filter_Encrypt, contributed by Thomas Weidner * Zend_Filter_Decrypt, contributed by Thomas Weidner * Zend_Filter_LocalizedToNormalized and _NormalizedToLocalized, contributed by Thomas Weidner * Support for file upload progress support in Zend_File_Transfer, contributed by Thomas Weidner * Translation-aware routes, contributed by Ben Scholzen * Zend_Json expression support, contributed by Benjamin Eberlei and Oscar Reales * Zend_Http_Client_Adapter_Curl, contributed by Benjamin Eberlei * SOAP input and output header support, contributed by Alexander Veremyev * Support for keyword field search using query strings, contributed by Alexander Veremyev * Support for searching across multiple indexes in Zend_Search_Lucene, contributed by Alexander Veremyev * Significant improvements for Zend_Search_Lucene search result match highlighting capabilities, contributed by Alexander Veremyev * Support for page scaling, shifting and skewing in Zend_Pdf, contributed by Alexander Veremyev * Zend_Tag_Cloud, contributed by Ben Scholzen * Locale support in Zend_Validate_Int and Zend_Validate_Float, contributed by Thomas Weidner * Phonecode support in Zend_Locale, contributed by Thomas Weidner * Zend_Validate_Db_RecordExists and _RecordNotExists, contributed by Ryan Mauger * Zend_Validate_Iban, contributed by Thomas Weidner * Zend_Validate_File_WordCount, contributed by Thomas Weidner A detailed list of all features and bug fixes in this release may be found at: http://framework.zend.com/issues/secure/IssueNavigator.jspa?requestId=11002 SYSTEM REQUIREMENTS ------------------- Zend Framework requires PHP 5.2.4 or later. Please see our reference guide for more detailed system requirements: http://framework.zend.com/manual/en/requirements.html INSTALLATION ------------ Please see INSTALL.txt. QUESTIONS AND FEEDBACK ---------------------- Online documentation can be found at http://framework.zend.com/manual. Questions that are not addressed in the manual should be directed to the appropriate mailing list: http://framework.zend.com/wiki/display/ZFDEV/Mailing+Lists If you find code in this release behaving in an unexpected manner or contrary to its documented behavior, please create an issue in the Zend Framework issue tracker at: http://framework.zend.com/issues If you would like to be notified of new releases, you can subscribe to the fw-announce mailing list by sending a blank message to firstname.lastname@example.org. LICENSE ------- The files in this archive are released under the Zend Framework license. You can find a copy of this license in LICENSE.txt. ACKNOWLEDGEMENTS ---------------- The Zend Framework team would like to thank all the contributors to the Zend Framework project, our corporate sponsor, and you, the Zend Framework user. Please visit us sometime soon at http://framework.zend.com.