Where is Google Maps Street View available? A whole lot of places, with more to come

Cars, backpacks, trolleys, snowmobiles and trikes are slowly mapping the world from a first person point of view. We know Google has been hard at work mapping the entire world with a combination of different satellite footage, but how much of that area is also covered by first person Street View imagery? On its "About Street View" page, Google has published a map that pretty granularly shows off where it has collected Street View imagery, and the number of places currently mapped may be surprisi...