I’ve been using Google Latitude for some time now, and have built up quite a bit of history. I’ve been having a play with the Location History Dashboard, which is quite scary. It’s correctly guessed which location is home and which is work and can tell me how much time I spend in both places, but it also shows me which of my friends I’ve visited and when, and can also show me a little animation on a map, showing my movements over any period of time.

I like it but it’s somewhat freaky. Of course, the real crux of the thing is to figure out something useful to do with this information. I keep thinking that there must be something but what exactly that is eludes me. Any suggestions?