Both graphs are very interesting, although the scale of the first one is not optimized.
The second one is generated by using the data of Skype Users who accepted to show their Skype status on a Google Earth map (almost 1000 right now!).
Quite interesting. Add your Skype status here on http://skmap.gatagata.jp and click on the "how to" link in the upper left corner for instructions! Fun!