Is there an app for mapping your friends? There are a lot of real time location apps for your friends, but what about an async one?

For example, I was thinking about an app where I could see all of my LinkedIn connections and Facebook friends in a single map view.

This way, whenever I travel to a new city, I can just take a quick look to see if there's anyone based in the area who I can meet up with.

It's totally fine that it wouldn't be accurate all the time (e.g. if a friend is on vacation and isn't in town). It'd actually be preferred that the locations are NOT in real time (of which there are plenty of examples).

Thanks!