If I made Facebook apps, I would mock this up at lot better, but unfortunately, I’m just an idea man and I don’t have any place to put this one. The basic idea would be to use the Google Steetview API to pull images of every place you’ve lived, then automatically create a visual collage of it. From there, you share it on facebook, twitter, etc… Super simple concept, probably not that hard to build, and if attached to right brand, could even be an effective marking tool. I did rough design of what the finished product would look like, but I imagine it could be made to look a lot more dynamic. If you saw someone posted their own collage on their facebook profile, wouldn’t you want to add one, too?