Tonchidot: Visual Tagging for the iPhone
Real working app? Proof of concept? Science fiction? All of the above? Don't care. Want it now. This amazing demo shows an App that uses the iPhone's camera to record and display visual tagging information in real time, right in front of you. Drool.
Want to see more? Check out their long (18 minute) presentation from Techcrunch 50. Amazing stuff.