Anyone used Waze? http://world.waze.com
What are waze drivers building?
Waze is a social mobile application providing free turn-by-turn navigation based on the live conditions of the road.
100% powered by users, the more you drive, the better it gets. Join the community of drivers in your area today!
Here's also a video introduction: YouTube - Waze guided tour
It's a free navigator, with free map, traffic and warning info. The cool thing is that the map is dynamic, and one could actually contribute to it simply driving around, tracing new roads, or going to the online map editor and fixing things (only on the travelled routes).
They started in Israel some time ago, and now they claim to have the best map & traffic data for the region. On some countries they start providing a base map obtained trough some parteners, while in others they start with a blank canvas (like in Italy, currently).
I looked at it time some months ago and my zone was basically clear. I retried the other day, and found many streets around here, including some recent features / modifications that haven't showed up yet on the cartography from the usual suspects, Tele Atlas and Navteq.
Some friends from major cities (like Rome, or Milan) say that they are actually already using it for their commute, since the reaction times on changing traffic conditions are very good.
The actual navigation application is available for Android, iPhone, WM and Symbian (not sure for BlackBarry).