Vinu Thomas has pointed out two upcoming webinars from Zend that he thought sounded interesting - one talking about development best practices and the other on troubleshooting PHP applications.
From Zend on the development best/worst practices:
Have you ever wondered how you could advance your PHP development? Have you considered using an Integrated Development Environment (IDE), an Issue Tracker or a Version Control tool, but were concerned about how complex it might be? Taking PHP development to the next level may be easier than you think.
From Zend on the troubleshooting techniques:
Understanding what's causing your PHP application to be slow or just break is often time-consuming, and almost always frustrating. Join this information-packed webinar, delivered by a senior Zend PHP consultant, to learn what techniques PHP professionals use for pinpointing PHP issues in development, testing and production