Unype – Google Earth and Skype Together

I just heard about a new service called Unype.  It is a local download program that you launch at the same time you have google earth and skype open.  It allows you to go to places in google earth and chat with other users in the same place. 

This might be useful for some geography classes or distance education classes discussing cities, landscapes… a variety of things. 

How might you use this?