Here are a bunch of design pattern related blog entries, talks and materials.
Note that I am transitioning these blog entries across from another system, so please be patient if the entries are not all here yet.
2000 January - Patterns, ModelMaker & Beyond
2002 September - Using Design Patterns in Real Projects
2002 September - Null Object Design Pattern
2002 October - An Introduction to Refactoring
2002 December - Mediator Dialog Patterns
2003 January - Object Orientation, UML and Delphi
2003 Aug - Pattern Automation and UML
2004 June - Object Thinking - Book Review
2004 August - Blackboard Architectural Pattern
2004 October - Design Patterns found in the C# Language
2005 March - Getting from State to Bridge Design Pattern - A Journey
2005 July - Object Relational Mapping Design Pattern - Using SQLObject
2006 March - Tooled Composite - Architectural Design Pattern
2006 October - More on UML Pattern Tools
2007 January - Teaching 23 patterns in 3 days - Experiences from the bunker
2007 July - Object Role Modeling - What is it?
2007 Nov - Thoughts on Closures
2008 March - Extract Composite - Refactoring to a Pattern
2008 Sep - State Pattern in Flex 3
2009 Jan - Designing software visually (incl. Executable UML and MDA)
2009 Feb - UML and Design Pattern support in Netbeans 6
2009 Feb -Towards a central repository of Design Patterns
2009 March - PureMVC - Architectural Pattern - Minimal wxPython Example
2009 April - Refactoring to PureMVC
2010 - Cairngorm vs PureMVC Model to View notifications
2010 - Ruby vs. Python list comprehensions
2011 - Recursively Cloning Directories in Ruby using Hard Links