I was roaming around looking for an answer to a question (didn’t find the answer, and I don’t remember the question), when I happened upon a site that had a Cluster Map, like the one I use, and also something called a worldmap.
introducing worldmaps
See where your website visitors are from with WorldMaps. WorldMaps (currently in Beta) is an IP address to geographic mapping service designed to give website owners the ability to visually see where their visitors are coming from (red dots represent the top 5%, i.e., the most active visitors). These images can be displayed publically on the home page, or on a private page for administrators.
It looks to be a very similar idea to cluster maps, but this one has a bit of variety in the way it marks the map, and you get a few more options on how to display it.