Les Traceurs is a game that allows you to collaboratively produce the Story of an event (be it a meeting, a conference, a workshop, a festival, a web-festival, etc...), almost live, and to disseminate it to the relevant federations and communities across the Internets.
A lot of frivolous things were to be seen at the F8 Deverloper's Conference, but behind the fun there is a tech revolution going on which will generate many other applications.