In addition to storing the details, TripIt can also be used to share details with other users. This means that travelling in a large group isn't going to be a problem anymore - within a few taps, everyone on the trip can have a copy of the itinerary, maps, contact numbers etc so nobody will forget to inform anybody and nobody will be left out. Definitely sounds like a useful app to have in such situations. TripIt for Windows Phone is free and is available now from the Windows Marketplace.
source:Ubergizmo