This may interest webmasters and bloggers.
Geo-localization is a tracking and mapping procedure which allows an internet users’ geographic location to be identified when he accesses your blog , forum or internet site. This is achieved using his IP address. An internet users’ geographic location can be established using this process and is 97% reliable for tracing his country, 75% reliable for tracing his town or region.
While WinVistaClub uses Clustrmaps, there is one I came across on harimaurya.blogspot today. Here are some links.
ClustrMaps - Hit counter map widget and tracker shows locations of all visitors to any site - free (not real-time)
http://www.geovisite.com/en/
FEEDJIT real-time blog traffic feeds
If you know of some more, please post them.