Virtual Post-it Notes

"'WorldBoard is a proposed planetary augmented reality system that facilitates innovative ways of associating information with places. Short-term, the goal is to allow users to post messages on any of the six faces of every cubic meter (a hundred billion billion cubic meters) of space humans might go on this planet (see personal web pages when you look at someone's office door; label interesting plants and rocks on nature trails). Long-term WorldBoard allows users to experience any information in any place, co-registered with reality.'"