This is a great project! I've been to Burning Man 10x and interactive projects are my favorite part.

Also, if I may, for folks that might appreciate more phone-based spontaneity, I've built an app to revive the social phone call. It works like a bat signal. Light your beacon and it reaches all your friends at once. The first friend to answer connects 1-1 and every other signal quietly drops. Check it out at trybeacon.chat

I agree this is so nice! Would be awesome if some variation of this becomes the norm in every big city or turistic landmark. It's relatively cheap for local gov to set and maintain couple of those and brings back a different way of using the technology/interacting with people.

That... is a great idea. Does the audio call go through your app? Or the regular network?