The jWorldMaps jQuery plugin makes it easy to show visitors to your site who's visiting, and where in the world they're coming from. It's simple to implement, requiring just a div tag, a reference to the jWorldMaps script library (and jQuery, of course), and a single line of initialization script. The result is a thumbnail map of your WorldMaps account
(get one here
), which expands to show a more detailed view on mouseover.