What you are looking at above is the state of the Tesla Supercharger network on The last day of 2013/first day of 2014. Tesla counts 50 Superchargers in the US (1 per state!) and another 14 in Europe. While Elon Musk originally planned to take his family on a Christmas holiday across the country, there are still some rather big holes to fill.
Those holes all fall in the “coming soon” category and if you take a look at this helpful 3rd party map, you can see a lot of the country is still being built.