London Mayor Boris Johnson has announced a plan to create a city-wide electric vehicle network dubbed Source London. It calls for 1,300 public-use charging stations to be installed by the end of 2013 - assuming the Mayan's weren't right about 2012. Any driver who registered for the network and paid an estimated annual membership fee of £100 (roughly $160 at the current exchange rate) could juice their EVs across all of the stations. For perspective, keep in mind that the city already has 250-plus stations with 16,729 electric vehicles and hybrids registered, of which only 2,100 draw power by being plugged in. That implies if the plan is completed, drivers wo