Via the locative mailing.list: "N8Spel" a project by Just van den Broecke for the Waag Society. It's actually a GPS-based mobile drawing game for the Amsterdam Museum Night.
Teams would go into the city where they compete on who would (geo)draw the most beautiful “8″ by walking with a GPS and a mobile phone. They could embellish their drawings with photo’s and video’s taken and submitted on the spot. The competitive element was creativity with both the drawing and the media. All submitted media were tagged to the geographic locations where they were taken. The player’s movements, tracks and media could be followed in real-time through a webbrowser
Here is a screenshot of the game
The technical description of the game is described here
Why do I blog this? well with some folks in geneva we were thinking about something like this, using a google map! In this case, I like the idea of "embellish their drawings with photo’s and video’s taken and submitted on the spot" which is an added layer on top of the GPS drawing.