On the SitePoint PHP blog there's a reminder about an upcoming Zend webinar being helps April 22nd (4pm UTC/GMT) about increasing application performance through caching hosted by Shahar Evron.
Zend are holding a free webinar on Wednesday 22 April from San Francisco (9:00am PDT, 4:00pm UTC/GMT). The event is led by Shahar Evron and titled "How to increase application performance using caching". Shahar will give a one-hour live demonstration showing the steps required to optimize and boost the performance of your PHP applications using Zend Server.
The web conference will show how to make use of the Zend Server Community Edition to squeeze more performance out of your PHP applications. The community server includes functionality for Zend Optimizer, a Java/PHP extension, the Oracle extension, phpMyAdmin and the Zend Framework.