MapQuest launched an MapQuest4Mobile app for iPhones that offers a rich environment with innovative new features through personalization “MyPlaces” and customization “place widgets”, as well as PC-mobile integration. Directions, including multipoint routing, are well executed. Users can easily change the order of several stops on a multipoint trip by dragging one or more of those stops to a different position in the order. The route is recalculated accordingly. MapQuest4Mobile app is also available for Andriod and BalckBerry phones.
More info: iPhone MapQuest4Mobile app (iTunes link)