The Frankfurt auto show is reflecting a change in the car buyers' interests. A survey in the US recently indicated about half of potential new car buyers would like a hybrid of electric. It appears the mood in Europe may also electrifying. Of course, in neither the U.S. nor Eurpe are electric cars widely available, yet. Old-fashioned hybridsa are already numerous, including the top-selling hybrid, Toyota's Prius. To find out about actual plug-in electrics, here's auseful tracker on what's available and luanch dates for those vehicles promised.