Sightings is a Geo taging plugin by webdez for WordPress.
The purpose of Sightings is to connect any post or page with a map of a specific location. Sightings is an easy to use plug-in that utilizes the Google Maps v3 JavaScript API to let you geo-tag any post or page in your WordPress installation. You can display all your recorded sightings on a larger map by using the shortcode: [sightings-map] on any post or page.
Requirements: PHP 5.3 or later.
Download and info: http://wordpress.org/extend/plugins/sightings/