Want to own a piece of the road at the Tour de France. Write your message and it’ll be sent to the Chalkbot (a project from Nike and Lance Armstrong’s LIVESTRONG foundation). It’s a robotic “chalk painter” that sprays yellow inked messages (the spray on chalk is fully bio-degradable and uses soy protein as a binder) on the roads that have been sent from the web or via text messages. Head to wearyellow.com to get your own message in the Tour and if you submit a message you’ll receive a confirmation email along with the GPS coordinates of where along the Tour de France route the message landed. Chalkot site allows you to create wallpapers for your PC, Mac or iPhone.
More info: Chalkbot