This is about a program which displays the path of a network packet in a map when u ‘traceroute’ to a server. As U know, when u traceroute to a particular server, the resulting IP addresses are the routers that the packets passed through on their way to the destination.
So in this program, the Geo-location of the ip address is obtained by a web service provided freely by the HostIP. And once you obtained the location in terms of lattitude and longitudes, then you can mark that location in a Virtual Earth API provided by Microsoft Mappoint services. And finally the network path is drawn in the map.
You can also find a tool similar to this in Google Gadgets. U can add one of those gadgets when u customize your Google Personalized Home page.
For more info about this Trace Route Map tool, visit here.