Travel planning service TripIt used an upgrade of its pro service (the paid-for element of the product) to release a rather charming video clip to explain the product.
For a product type that is still in its relative infancy, at least in terms of mass adoption, this is actually a pretty good way of illustrating exactly how mobile itinerary management works.
httpv://www.youtube.com/watch?v=9S9PSyxzu9A
Haven't quite forgiven TripIt for peddling the user-used word awesome, however.
NB:Hat-tip Tom Botts.