waze is an alternative GPS app which has just been released for iPhone, Symbian, Android and Windows Mobile devices, with the possibility of a BlackBerry version coming soon.It does, however, appear to be very US centric at the moment.
Waze is a social mobile application that enables drivers to build and use real-time road intelligence. The service includes constantly-updated road maps, alerts on traffic and accidents, and data providing users with the fastest route to get to wherever they need to go.
Map and traffic updates are automatically collected and generated as users drive with waze activated, but drivers can also actively report and update other users with what’s happening on the road including accident alerts, police traps, weather hazards, cheap gas offers and more. And the best part? Because the map and all of its content is driver-generated, waze is completely free for users.
At waze, we encourage developers to build additional applications for drivers using our live maps. We provide access to the map and the map data itself as well as our real time API. Please check our terms of service for more information and feel free to contact us if you have any questions.
Definitely NOT US centric.
In fact it was developed in Israel, as freemap.co.il, and once you have even a small user community, it becomes extremely useful and a real mapping & navigation alternative.