Genealogical mapping programs aren't new or that uncommon, but this new App called The Family Nexus is outstanding in its utility and ease of use. Basically, the app connects to your portion of the FamilySearch.org Family Tree, loads several generations of your ancestors and then displays the results in a zoomable map interface. Here is a video that illustrates how this mapping app works.
Introducing The Family Nexus Mobile App
I downloaded the app and waited a few minutes while it compiled the markers indicating where some event occurred in an ancestor or relative's life. Here is a screenshot of what I saw when I looked at the western United States.
When I zoomed in on Provo, Utah, I found that 14 events had occurred right here in Provo.
When I clicked on the number, I got a specific list of each event and the person involved.
The trickiest part of this was taking the screenshots with my iPhone. I showed this to my wife and we immediately realized that had we had this app during our trip to the Northeastern United States last year, we could have visited graves and other places of interest that we passed without knowing what had happened in that area.
I will definitely be using this app. See http://thefamilynexus.com/the-family-nexus-mobile-app/