Just how "world" is that World Phone?

There's an interesting graphic online in a recent article on the economist.com. It shows the areas of the world that have GSM coverage for a BlackBerry. Extrapolating that to cover any data service at all, since that's all that BlackBerry uses, it is an interesting view of the growth of mobile technology across the globe. Here's a hint: Avoid northern Canada, the Amazon , the Sahara and Gobi deserts, the Australian Outback and the Russian East and you should be fine.

Or, more simply, most places where lots of people live have service, so it isn't a big deal. But it is a cool picture.