Great thread, OG. It's turned into a microcosm of the country--try to start a serious discussion about oil addiction and the conversation goes directly to impractical silliness. First things first: get our lips off the oil ***, and let go of that chunck of coal that's got us caught in the ball trap. We've got enough natural gas fto stage a hundred year moratorium on oil and coal. Maybe, just maybe, we could come up with some serious renewable source in 100 years.
As far as the trillions that it would take, that's only for refueling stations--as I said, the technology for natural gas driven vehicles and factories has been there for years. Let's see: Iraq=a gazzillion dollars a week; Afghanistan=a gazzillion dollars a week. Look, there's 2 gazzillion dollars a week for our retrofit right there.
Unfortunately, the biggest problem with natural gas is that the guys who own the gas fields wear big ol' greed hats. Did someone say "eminent domain?"