See Robin Hanson's paper on "The Economics of the Singularity" at http://spectrum.ieee.org/singularity, which is an update of his 1998 paper in the Journal of Transhumanism.
Hanson is the most fascinating of the "Virginia School" of libertarian / public-choice economists associated with George Mason University. The Virginia School is described at http://www.mercatus.org/MediaDetails.aspx?id=22330 , and is compared to the Austrian School at http://www.scottbeaulier.com/120908_beaulier_hall_vienna_to_virginia_1_.doc .
