Here are the slides and here is the code for my Using Design Patterns in .NET presentation.
I had a good time speaking at the event today...I was very shocked; my Using Design Patterns in .NET talk drew so many people that they had to create another session on Sunday because the room was not big enough to hold everyone who wanted to see it.
I was able to cover the following patterns in this talk: Strategy, Template Method, Factory (abstract and method), Singleton, and Command.