Dave, an excellent post.

I was a little surprised to see you say:
"Coal gasification is a bit further along in the prototype stage but will not substantially add to future US supply." With large US coal deposits it's hard for me to believe they won't make use of them big-time at some point, both for gas and liquids. Are you saying they won't be able to, or what?

And what we will drink when the water is gone? :) Hm, I retract the smiley.

I think the problem will be scaling-up.  It will take a lot of infrastructure we don't have.