stumbled across this post today - it is a simple little app that lets
you run an .exe from Visual Studio when a file changes, and in this
case, he is using it with nunit to provide Growl notifications of
pass/fail test results:
http://jason.diamond.name/weblog/2009/09/27/autorunner/
nice simple way to bolt Growl-enabled unit testing onto a VS project
with minimal fuss.