An advocacy group called Plug In America has released this excellent "Plug-in Vehicle Tracker." It's a comprehensive list of all plug-in electric vehicles, whether they're in the concept phase or on the market. Scanning the list you can get a sense of the entire range of plug-in options, from the goofy Myers three-wheelers to the rumored Rolls-Royce Phantom EV. There are about 10 available now. I was particularly surprised to see how many plug-in commercial vehicles are planned.