I\'m looking to introduce a unit testing framework into the mix at my job. We\'re using Visual Studio 2005 (though we may be moving to 2008 within the next six months) and
The built-in unit testing in Visual Studio 2008 is all right, but its difficult to integrate with CruiseControl.NET, certainly a lot harder than normal NUnit.
So go with NUnit if you plan to have nice automated tests.