Ask HN: Can Tracku iOS app do something for Japan?

I'm one of the developers of the iOS app Tracku. It is the only application that could show an unlimited people's location on a map. We also have a shared pin feature that allows users to share geographical locations of interest.

We are used in a tourism business in Florida where tour guides use it to track each other to prevent jetski collection in narrow woods.

It is this morning that it came to struck me that maybe our app could be used to help someone in Japan since it's a proven app and it seems that the internet is still working in Japan (obviously a guy kept playing an online fps game during the earthquake).

However we don't know in what way the app could be used or how do we let people in Japan know. Can some one shed a light?

The app is at http://www.trackuapp.com. It has a free version but we will be making the paid version free just so that everyone in Japan can use it if it actually helps.