I just noticed (admittedly, a bit late) that Flickr has added mapping to its already overflowing box of tricks. In a nutshell, you can stick each of your pictures on a map of the world so that everyone (or just the people you choose) can see where it was taken. ‘Geotagging’, for jargon-lovers.
I just went through and geotagged a bunch of mine, and then looked to see who’s been taking pictures in the same locations. Loads of people. Very amazingly bloody clever.

