Just in case anyone is interested I wrote a chapter for the Wrox book:
Real World .NET, C#, and Silverlight: Indispensible Experiences from 15 MVPs
http://www.wrox.com/WileyCDA/WroxTit...118021967.html
CHAPTER 14: DRIVING DEVELOPMENT WITH USER STORIES AND BDD
the code for the chapter can be found on my git hub account
https://github.com/elbandit/Tic-Tac-Toe
Cheers
Scott