Where do RedNotebook's users come from?

This map is based on the repositories at http://robin.powdarrmonkey.net/ubuntu and has some limitations:

• It's generated by hand, so it probably gets out of date quickly;
• It's only based on visitors' IP addresses, and can't handle IPv6 addresses (but there aren't very many of them);
• For privacy, it shows a rough location of the users ISP, not the user themselves;
• Because it's based on repository visitors, it can only know about Ubuntu Jaunty and Intrepid releases;
• It can't tell the difference between new users and upgraders.