This is something I had been looking from ages. VIsual Track Route is an online mashup tool which allows you to visual trace route an ip on google maps. You can actually see how the hops are made from one ip / country to another.
In their own words : The visual trace route tool displays the path Internet packets traverse to reach a specified destination. The tool works by identifying the IP addresses of each hop along the way to the destination network address. The estimated geophysical location of each hop is identified using MaxMind’s GeoIP database. After all of the hops locations’ are identified, the path to the destination is plotted on a Google Map.
So if you want to detect traceroute of some person whom you are talking to or has left comment on this can be your best route. Check out Visual Trace route