There's already a few hybrid trucks on the market (most notably from GM), but true plug-in hybrid electric trucks are another matter altogether. Chrysler now looks set to change that, however -- at least in a small way -- with its new Ram plug-in hybrid that's set to roll out to fleet operators this summer. It was just unveiled at the Washington D.C. Auto Show, and it pairs a 12 kWh battery pack from Canadian battery-maker Electrovaya with Chrysler's own 5.7-liter HEMI V-8 engine, which Electrovaya says will allow for up to 20 miles of driving on electricity only. Unfortunately, there's no word on any plans to actually make the truck available to