On googling I found Behavior Driven Development (BDD) with SpecFlow and ASP.NET MVC. You might find it useful, take a look. Also go through Behavior-Driven Development with SpecFlow and WatiN
A nice presentation on Pros and Cons of BDD
A channel 9 video Behavior-Driven Development in the Real World
and last but not least an InfoQ article Behavior Driven Development In .NET