Expedia has launched a new free iPhone application, TripAssist, that links to its mobile website to allow users to mange their travel itineraries. TripAssist allows users to research flights, destinations, hotels, cars and activities. Once they make a reservation, they can manage and update their itineraries, find an alternative flight, research their seats and access real-time flight information. The app also offers real-time SMS and email updates for free. "Travel,