Electrical Profile Monitoring System for detection of atypical electricity consumption. It's patented, it's on its way, and it's conceived for detecting Grow-ops. I haven't plunged into the technical data yet, so I have no opinion on it yet:
http://www.freshpatents.com/Electri...t20070830ptan20070200553.php?type=description
http://www.freshpatents.com/Electri...t20070830ptan20070200553.php?type=description