following this post
I created a page with a world map showing all my blog's posts as pins. I used this code to call the map:
<?php if ( isset($wpgeo) ) $wpgeo->categoryMap(); ?>
A while ago (don't know exactly when, but definitely still in 2012), this method stopped working.
I'm guessing that something in the plugin's code changed, but I'm not sure.
Either way (because this method was a little bit uncomfortable anyway), I think it would be an important feature of the WP Geo plugin to have such a world map.