Immortality Institute 
Dedicated to education regarding the prospect of indefinite life extension technologies. Offers forum, chat, frequently asked questions, and articles of interest.
http://imminst.orgWhat's Our Future
Forum established to discuss what our future will be like in several different areas, such as technology, computer, economy, politics, war, and sociology.
http://www.whatsourfuture.com
Apocalyptic Dreaming
Interactive forum for thoughts, visions, and fears of the apocalypse.
http://www.apocalyptic.org/
AHA Paradigm Project
The AHA (Advanced Human All) is a mainly internet based community of scientists and researchers of all disciplines that work on a new synthetic paradigm as a foundation of future science, future communication and future community.
http://groups.yahoo.com/group/aha_network/
FutureFeature
Discuss what the future should bring.
http://www.futurefeature.com
World Scenarios
A community to discuss and vote for plausible humankind future scenarios. Features polls.
http://www.world-scenarios.com/
Flickr: Robots: Technology Pop Culture
Share and discuss the latest tech news (gadgets, robotics, cyborging, futurism) or geek out on robots in pop culture media (film, anime, manga, comics).
http://flickr.com/groups/robots/
Boldly Go!
The blog exploring the possibilities the future will provide in science, technology ans society.
http://boldlygo.org/
