The Developer Tutorials blog has a new article that talks about their method for creating simple geotargeting for your visitors.

In this tutorial, we'll take a look at the technique of geotargeting, or serving content to users based on their physical location. The technology is invaluable; with simple techniques, you can target advertising to specific users, collect more accurate usage statistics, serve content in different languages for different regions and provide local information like weather reports to your visitors.

They use the GeoIP services offered by Maxmind to perform the IP to location translation and the PEAR package already created to make the integration as painless as possible.