Car grid power. I like it... I pull in the driveway after commuting home (having charged my hybrid battering braking while getting off the freeway(yes I know this is an over-simplification)). I plug in my car to my house. It cuts the peak energy of me turning on the lights, the home AC to cool it down and the oven to start dinner. Later in the evening while I'm asleep and it is past peak energy hours, my house recharges my hybrid battery for the next day (yes and forget plugging in at work - I'm not letting my office suck the power from my hybrid ;-).
I'm not really worried about global warming. I'm more worried about our dependence on foreign oil - especially since the oil money seems to be paying for terrorism (Some of the extremists in Iran; Iraq; Saudi Arabia?).
I'm hopefull our ingenuity will be creating more non-oil energy savings in the future.
And the Volt... See the other article? GM is starting LI battery testing. The Volt may become real after all.