I just did a Geolocation mashup to visualize where my blog readers are coming from on a particular day. Below is a visualization of my US/Canada visitors from February 14, 2008.
All of the data is based off of IP addresses from my referrer logs.
To see how to do this, check out: http://www.goldb.org/geo_maps
Copyright © 2006-2008 Corey Goldberg
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.