Sorry, I'll update the wording, but it is actually
iFindStuff... developed by forum member Chameleon. Basically, it already has built-in support for mapping out devices, distance calculations, all kinds of fancy stuff. Mike is easy to work with and has sent me the data that he would need - now that I have the Android devices capable of updating Indigo I'll work on getting him data and the details of how we can make this work.
The idea is that you have one central place to provide, say, a map of where all the family members are (via the Android or iOS device).
Adam