OpenStreetMap “is an effort to produce free (CC-licensed) streetmaps of the world.” It’s in “pre-pre-pre alpha” at the moment.

The idea is to get free data by running around with a GPS, analysis of aerial photography or other methods since map data is expensive in Europe and elsewhere. We are at a fairly early stage with an open XML-RPC interface and an applet that can edit point data from GPS units and streets drawn on top of that. There is an active mailing list and a wiki you’re welcome to join.

Via Matt. See previous entry: London Free Map.