I lacked in-depth knowledge on NUnit, XP, and Continuous Integration techniques. Having spent nearly a day on it, now I am much more familiar with these concepts and its technologies.
Here is a good article on Continous Integration in simple English. I faced portions of this concept in one of my earlier projects. If I were to take this route, I would do it properly.
Some articles on Test Driven development
and a good book http://www.microsoft.com/mspress/books/6778.asp
Avanade’s knowlege base has a wealth of information on practical use of these concepts. As in any organization, this information is internal to its employees.