My guess is that this will be available around 2015...
Could maybe be little sooner, since i heard that the new Porsche Panamera is also comming out with hybrid power.. who could imagine that ?? This car will with us next year.. 2008...
About the price, don't bet your hopes on it, goverments will tax your flying on an hourly rate, don't expect to have power for free, the whole world economic system will fall down, imagine that those 'greenpeace guys' and other green extremists will need to go to work hahaha