Notes and data attached to real-world places, for the BBC.
The idea was small and a bit magical: let people attach a note — text, a photo, a sound — to a physical spot, and let anyone else standing nearby pick it up on their phone later.
It came out of the BBC's R&D work on media, annotation and place, at a point when GPS-on-a-phone was still a novelty rather than a given — which made the whole idea feel more like a magic trick than it probably will to anyone reading this now.