Transhumanists

Hanson, Robin - Economist and polymath; inventor of "Ideas Futures" markets; allegedly open-minded and politically undogmatic. His homepage is immodest(?) and says much about him, not necessarily bad things.
http://hanson.gmu.edu/

Magalhães, João Pedro de - Researcher of human aging, with several essays about transhumanism, human nature, and the ethics of new technologies.
http://jp.senescence.info/

Yudkowsky, Eliezer - Research Fellow of the Singularity Institute, author of "Friendly AI" and "Staring into the Singularity". His Web complex, "The Low Beyond", contains professional and personal writings.
http://yudkowsky.net/beyond.html

Pearce, David: HedWeb - Interests: how biotechnology will allow us to get rid of suffering in all sentient life (allegedly); animal rights; consciousness; psychopharmacology; and "Why does anything exist?" An attractive, thought-provoking, and many-tentacled site.
http://www.hedweb.com/confile.htm

Machado, Romana - Essays and press appearances from the computer programmer, transhumanist, and extropian.
http://www.fqa.com/romana/

Davis, John K. - Transhumanist and technology advocate. Incorporates the former Transhumanist Unitarian Universalist Network.
http://www.johnkdavis.com/

More, Max - Futurist, co-founder and chairman of the Extropy Institute.
http://www.maxmore.com/

Tipler, Frank J. - Mathematician and originator of the "Omega Point" theory that the universe is finite, and therefore ultimately controllable in its entirety by sentients.
http://www.math.tulane.edu/~tipler/

Vita-More, Natasha - Founder and director of the Transhumanist Arts and Culture World Center, president of the Extropy Institute.
http://www.natasha.cc/

Bostrom, Nick - Advanced topics in transhumanism with informative material in analytic philosophy and computational neuroscience.
http://www.nickbostrom.com/