I had the luck of running into a Tesla electrical tech at the Rockford, Il Supercharger today. He had just flown into Rockford to add coolant to one of the Superchargers. He was busy, but I managed to get some information from him. - ALL Superchargers are monitored from a single central location (via wireless communication). Many times Tesla is aware there is a problem before customers even use the superchargers, and initiates action. There is a small team of specialists who fly into problem locations for repair, if required. He had a monitoring case & was verifying that his repairs were successful (I assume via wireless or sim) from his rental car after the repair. - Tesla is approximately 2 weeks behind their new Supercharger build-out schedule, but he stated enthusiastically that they have become extremely aggressive with expansion recently. Also said by end of 2014 Tesla owners will be able to drive ANYWHERE in the U.S. via Superchargers. - Asked him if he had any feeling about how the past quarter ended, he smiled, said there were a lot of Model S's on the road right now & thinks they will hit 25% gross margins already! He was young, alert, intelligent & pleasant... wish he (and I) had more time to chat.