The Zend Developer Zone as posted a new screencast from Zend about the event debugging functionality offered with their Zend Platform product.
Zend Platform is a powerful tool both in development and in production. [...] One of the cool features of it is the Event Debugger. Here's a short screencast that demonstrates how it works and how it integrates with Zend Studio for Eclipse.
The screencast is only about three and a half minutes long, but they cram a lot of screenshots and output results into that time. Cal Evans himself does the narration.