At the moment, you're better off buying some little lightweight diesel. You get similar well-to-wheel efficiency, but it costs a lot less.
In the future, with rising oil prices, and falling costs of the new technology, things will almost certainly change.
In Germany, diesels are a big thing; indeed you see models over there we don't have here. I wish the price of diesel would return to being less than gas - but sadly, we don't have the refining capacity we once had.
As to the "new technology" though - don't hold your breath. Wind isn't going to work, neither is solar. We may see some advances in other fuels - most likely towards natural gas, but alcohols aren't going to work in the long run.
The Volt - or any other brand of electric car, just isn't viable in the long run. First, it doesn't do what it advertises - requiring fossil fuel to recharge it - and in fact MORE fossil fuel when you consider that every transfer/exchange of power loses a tad in the process. And even if they get the cars to cost the same as their all-gas counterparts, you still have the above.
The Volt was a dinosaur in concept, a dinosaur on the drawing board, a dinosaur on the factory floor, and a [flame-throwing] dinosaur in operation. And let's face it - electric cars are NOT a new or emerging technology, having first arrived on the car scene back in the 1800s.
It [the Volt] is going the way of the Leaf, Solyndra, Beacon Power, Evergreen Solar, SpectraWatt...
Most people aren't aware of what's happening in the construction industry, where groups like the Green Building Council and their LEED initiative are costing building owners and taxpayers hundreds of millions of dollars in added costs as the federal government is "stimulating" the construction industry by requiring buildings get LEED certifications in order to get funding from the federal government. LEED, which is supposed to stand for "Leadership in Energy and Environmental Design," really stands for "Least Economically Efficient Design" and has nearly doubled or in some cases tripled the cost of lighting and HVAC systems, and is more than an energy policy, it's social engineering as well, LEED "scorecards" including points for how close buildings are to bus routes, bike paths, etc. But as one proponent put it in a meeting I attended a couple of months ago, questioning the need (and added cost) for a particular aspect of the design - "But, we're saving the planet!" I kid you not...
The reality is, green is the new red, no matter how you look at it.