The IBuildings techPortal site has posted the latest episode in their podcast series of talk from this year's Dutch PHP Conference. This episode is Stefan Esser's talk "Secure Programming with the Zend Framework".
The idea of that talk is to go through the classes of vulnerabilities or security problems that you usually need to take care of yourself and look at the Zend Framework to check what internal protection ZF offers and how they are used and what problems you still need to solve on your own.
You can either download the episode directly or you can listen via the in-page player.