The July 2005 edition of MSDN mag is available online, and includes a good article about the design patterns you're subconsciously using in the .NET framework, perhaps without realising it. It's an interesting read, and helps to demystify the potentially academic and confusing nature of some of the Gang of Four patterns by relating them to familiar .NET concepts.

On another note, I don't think I'll be renewing my subscription to the hardcopy MSDN mag if the material is going to be made available online so quickly - I only received the June issue a week or so ago.