To explain what DocBook is, what the pieces are, and how they fit together in a production environment.
To show examples of what kind of output is possible from DocBook using the stock stylesheets and customizations of them and give you an idea of what it takes to create and maintain them.
To give me a reason to play with Operashow and DocBook. Operashow is a feature of the Opera web browser that causes it to key off of simple css and present an html page as a slide show. The advantages of Operashow:
Very light weight
Easy to publish a fuller version of the talk on the Web
The published version can easily be made accessible to those with disabilities (contrast PowerPoint)
No temptation to use goofy DHTML effects