Radical Abundance by K. Eric Drexler

This is the book I'm most looking forward to reading, when it comes out next year. Drexler, who wrote Nanosystems and Engines of Creation, is controversial and maybe 50 years ahead of his time on some things (he's "active in space politics," and was involved with the Moon Treaty of 1980). But he's also extremely perceptive about the ways the world economy and political landscape are changing radically because of the power of personal technology. (Also, he writes for people like me who appreciate the concepts but don't understand the mathematics at all.)