With the iPhone or Android apps cyclers can track their routes and upload them on a common map. The results are beautiful.
With UrbanCyclr we'd like to do the same but globally.
Full screen map: http://www.urbancyclr.com/static/map.html
If you think you can create more beautiful maps than fusion tables don't hesitate to contact me :)
For the enthusiasts, here is a video that KIBU made using the data: http://www.youtube.com/watch?v=qBkw_NRvJq0