Expedia (NASDAQ:EXPE) stock plunged 15% after disappointing bookings numbers and the departure of CEO Peter Kern.The travel site earned $132 million, 92 cents per share fully diluted, on revenue of $2.89 billion during the quarter. This compared with net income of $177 million, $1.11 per share, and revenue of $2.61 billion a year earlier.However, the departure of Kern, who had been CEO for four years, spooked investors the most. Expedia was due to open this morning at about $134 per share, a market capitali ...