It looks like Stacy (one of our forum members) has created another cool project using the Z-Wave PC SDK. His previous one used Windows Workflow Foundation, and his new one uses Microsoft Robotics [Developer] Studio. Check out his handiwork if you have time.
http://blogs.msdn.com/coding4fun/archive/2008/05/23/8544962.aspx
Thanks for putting together these unsolicited yet very cool projects, Stacy!
Chris