[rachelbythebay]

Invite people to post pictures of their former residences tagged with the actual street address, not human-unfriendly lat/long data. This way you can see the way something was long before you got there, or see what's happened since you moved out.

Bonus points if you let residents add notes to explain why something is the way it is. Think of the things which nobody would understand otherwise, like this: "We put a drain here because a natural spring comes up when the water table rises after a week of rain. Make sure it doesn't get blocked."

It's the social network in which all locations are fixed and time is the interesting axis.

If you make this and make a billion dollars, send me a chunk, okay?

[maresca]

I'm currently working on something close: location based notes.

http://www.writenear.com