EN: Last weekend I was on a small meeting of computer affine people. Some are involved in interesting projects. One is OpenStreetMaps which has the aim to create street maps under a free content licence. Everybody can contribute by uploading GPS data of streets etc. using one of the easy to use interfaces. Sure you should always be aware of issues regarding privacy (as the data be traced back to your account) when participating.
Jörg who is quite involved in the project kindly lent me one of his GPS receivers so I can play around with it and send the data of my tours.