Two more articles posted on MSDNAA:

Introduction to Test-driven Development with NUnit and the NUnit Add-in
This article explores Test-Driven development (TDD) techniques.

Fun with Unit Tests–Testing Abstract Classes
In this article I’ll be looking into a trickier part of unit testing; testing the functionality of classes that cannot be instantiated on their own, abstract classes. I’ll show how to overcome this obstacle using “Mock Objects,” a technique that has a whole methodology behind it all on its own. We’ll see how mock objects provide us with abilities that let us query what’s happening inside our derived class.

Boy, my article list on there beginning to look like something.