There's some debate if this is geotagging or geo anything so I've used maps for now. Found via Digg, Thomas Hawk has a nice review of the new mapping feature in Flickr.
I have to say its pretty neat and works even better than Frappr at the moment. Although I'm wondering open this data is? For example will I be able to take the geo data out of Flickr once I've arranged all my pictures so nicely on the map? And if so, how? But for right now, London is looking a little bare at the moment so go add pictures! Look out for the lack of mapping from Yahoo maps outside northern america.