UPDATED: TomTom app for the iPhone jumps to version 1.5 & brings support for the iPhone 41
Now one of the key advantages TomTom has to offer is the fact that it includes 1 million more miles of roads in the US versus some of the other competition. However, it should be noted that the update is only available to the North American version of the TomTom app, but it's expected to happen for other parts of the world too some time down the road.
UPDATE: Oops, it seems all the cool features the new update will bring will be available in every version of the app, not just the one designed for North America, as the guys from TomTom have pointed out to us. In addition, it turns out the 1.5 update is actually not available as of now, so we'll have to wait a bit more before the goodness becomes publicly-reachable.
Apple iPhone 4 Specifications | Review