On Monday, they released geotagging of photos, and in one day, 1.6 million photos were geotagged, including all of my flickr photos. The geotagging was made possible partly by a product that my group works on. Neat!
Geotagging is one of those things that at first you wonder, "why would I want that"? After you use it on a community site like flickr, you realize the cool things you can do, like search for photos of sunsets near the Strait of Gibraltar. In a year or two, I would expect that most cameraphones will automatically record geotags in images, and that some consumer cameras will do so too--but in flickr, it's so easy and quick to geotag photos. Start geotagging now!