I've been trying to get CruiseControl.NET to work with PVCS and finally found the source of my headaches. If you are not familiar with CruiseControl.NET, it is a continous integration tool from ThoughtWorks. It monitors your source code control database or file-based repository for changes and launches your build process whenever changes are detected. Its great for projects with many developers that are creating code that needs to frequently be fit together and tested.