STEALTH IN FULL VIEW: Class is over for the oh, say, thousands of people studying AI with Stanford (& Google) profs, Sebastian Thrun and Peter Norvig. Their servers were apparently attacked during the final (a student trying to buy more time?); ambiguities in wording on the exam frustrated some. Sebastian and Peter answered some questions here in their video "office hours." Not only are more classes on the horizon, but the prof pair have their own edtech startup under construction, too, called "Udacity." Watch out, Khan!