Geoff Davis' FormController tutorial from the Plone Conference 2004.
Presentation/Tutorial Handouts
The LinguaPlone tutorial from the Plone Conference 2004.
Using CPS components with CMF / Plone. (OOo) Talk By Julien Anguenot
Railroad is a standards-based repository for large binary files such as digital media, along with their metadata. It is designed to be easy to integrate with content management systems and other client software.
MySite - A Plone Product Development Tutorial. Slides of the talk by Raphael Ritz (sorry, but the live demo is missing of course).