You can now download audio of my Design Patterns: Defining and Sharing Web Design Languages talk from South by Southwest (SxSW) 2007. In it, I discussed how to put design patterns to use within Web applications with an overview of the what, why, and how of shared online design pattern libraries.
Audio from the talk: Design Patterns: Defining and Sharing Web Design Languages (12.1 MB MP3)
Slides from the talk: Design Patterns: Defining and Sharing Web Design Languages (4.5 MB PDF)
From the official description
This tlak will take an in-depth look at defining and sharing Web design patterns. In particular we'll explore communicating when and how specific design patterns should be applied, what it takes to develop a usable design language, and how disparate lists of design patterns can converge into a shared online resource. The content will be based on an ongoing online conversation.