Will people be living on the moon in our lifetime? Better yet, can Americans do what they do best -- exploit a resource for all its money-making potential -- on the moon? If those at last week's Las Vegas Space Conference have their way, the answers to those questions is a resounding yes. Don't let the topic throw you. These folks aren't sporting aluminum helmets and drinking Tang between discussions of Star Trek episodes (although the television program did occasionally come up in casual conversation). These are hardcore geeks who are united in realizing the full potential of the moon....