a picture is worth a thousand keywords

Wow. An image search engine, not based on keywords nor meta-tags, but rather an algorithmic visual analysis of a picture. This Tin Eye technology is such a fresh idea. Imagine what would happen if they combined it with Sea Dragon and Photosynth. It'd be like Google Maps' street view, but instead of the Google car supplying the photos, you'd have the world's population doing it. And instead of being limited to the street, you'd be limited to whatever people happened to shoot photos of.