At the f8 conference in San Francisco Facebook gave all attendees an RFID tag attatched to their conference badge. It allowed them to “check in” at physical locations around the conference simply by tapping the tag on a reader.
Tapping in at a location updates your Facebook status - and allowed them to do some really cool visualisations.
It’s the same technology Facebook use for their Keg but it’s expanding on the concept a little further. If you think about the kinds of things this is hinting at you’ll get physical “like” buttons and all sorts of things. Interesting for sure, but it raises a really important question.
How long before something like Facebook Presence becomes an ID card that contains your entire social graph?