The latest version of Wayfinder Navigator for mobile phones has just been released.
Wayfinder Navigator 6.5 provides a mobile navigation service with road changes updated automatically; it also has the option to download larger map areas, shows speed camera locations, features live traffic updates (in association with TrafficMaster), and now includes a world map service to zoom in on any location in the world. Wayfinder says it is easier to use as well, which is probably just as well.