There's a website, called, "The Linux Counter," where you can register as a Linux user and also register the information about your system. No mailing lists or anything, it seems, if you choose to register. Once you register, you get a cool little Linux logo, showing you as a registered Linux user, with your registered user number.
From the website, you can see a breakdown by country, state and city, as to how many registered Linux users there are in each place. Also, you...
