Adidas: Boston Marathon in Street View
Adidas have produced a Google Maps app that lets you follow the whole of today's Boston Marathon route in Street View.
The Boston Marathon Map lets you follow the route of the marathon using Google Maps Street View. The map lets you navigate to points of interest on the marathon route and includes an overlay on top of the Street View to enable you to jump forward to the next point of interest or go back to the previous POI.
The Boston Marathon app includes a Google Map of the route and a terrain chart.