I just spent most of today working on my Microsoft SBA Add-in and listening/watching the latest couple episodes of .NET Rocks TV.
In these episodes Jean-Paul Boodhoo explains the Model-view-presenter (MVP) patterns, demonstrates NMock v2 framework, and builds a simple application using Test Driven Development/Design process. He does a great job explaining these concepts while developing a simple web form application. This is well worth your time if you have a couple hours to spare.
