Some of this info has been mentioned in my other blogs, but here's a summary of some of the services available for "geo-plotting" your website and blogsite visitors:

gVisit is a very cool Google Map Hack that shows which cities of the world each visitor is from. It only shows a maximum of 20 visitors at a time, so older visitors disappear. There's even an RSS feed available with latitude/ longitude coordinates for each visitor. The reporting is not real-time, but this service is very satisfying to watch (obsessively :).

Eighteen year-young genius Kailash Nadh of ultra-fast Blog pinging service, Pingoat, has a bit of Perl code available to convert IP addresses to countries. His database comes from IP-to-Country, who have PHP sample code

Maxmind also has a free IP-to-country database and sample code in Perl, PHP, C, and Java.

If you haven't seen it yet, check out Google Maps. If you want to write your own web scripts to write "Map Hacks" and display the results using Google Maps, you need to sign up for a Maps API.

(c) Copyright 2005-present, Raj Kumar Dash, http://geoplotting.blogspot.com