Changesurfer Radio
Weekly program about technology and politics, produced by Dr. James J. Hughes, transmitting a high-tech vision of a radically democratic future. Frequent topics includes biotechnology, bioethics, space, science fiction, sexuality, and radical politics.
http://www.changesurfer.com/eventhorizon/

Extropy Institute
Transhumanist group which advocates using technology to extend healthy life, augment intelligence, optimize psychology, and improve social systems.
http://www.extropy.org/

Homo Multifarius
Unique speculative perspective on the possibility of individual humans sharing multiple brains.
http://www.futureperspective.com/hmindex.htm

World Transhumanist Association
Explores possibilities for the "posthuman" future created by increased merging of people and technology via bioengineering, cybernetics, nanotechnologies, and other emerging innovations. Offers an academic journal, e-zine, FAQ, discussion lists, and references.
http://www.transhumanism.org/

Betterhumans
News, articles, and links related to scientific advances in human improvement.
http://www.betterhumans.com

Anarcho-Transhumanism
A synthesis of anarchism and transhumanism, centered on the attainment of political, economic, and biological freedom.
http://www.anarcho-transhumanism.com/

Cyborg Democracy
Weblog and essays that approach progressive politics from a transhumanist perspective.
http://www.cyborgdemocracy.net/

Mind Uploading
The putative future process of copying one's mind from the natural substrate of the brain into an artificial one, manufactured by humans.
http://www.ibiblio.org/jstrout/uploading/MUHomePage.html

Wikipedia: Category: Transhumanism
Definition, history, and various topics.
http://en.wikipedia.org/wiki/Category:Transhumanism

The Advent Of Humanisation
Suggesting that the human race has a certain genetic potential - an inherent capacity to create a particular form of society - which is now close to realization.
http://www.humanisation.org