Now in public beta, GeoGraffiti is a free “Verbal Bulletin Board” that allows you to record and share location-specific voice notes, or “Voice Marks”, whether you’re on the go or in front of your computer. Find a new coffee shop that you love? Call up GeoGraffiti, and leave a Voice Mark to let the world know.
The uses are pretty interesting: traffic cam warnings, cool restaurants, and public restrooms are a few that come to mind without even thinking.