Interesting & good news – Zend Framework is being bundled as part of Ubuntu Linux: http://devzone.zend.com/article/3232–Zend-Framework-to-be-part-of-Ubuntu
Direct link to article: http://andigutmans.blogspot.com/2008/02/zend-framework-to-be-part-of-ubuntu.html
Also found an interesting presentation on version 1.5 of the Zend Framework.