Jose Garcia at Meme Therapy is running a Brain Parade on nanotechnology risks. Both the Brain Parade concept and the content are excellent.

You'll find David Berube, Mike Treder, Patrick Lin and Dietram Scheufele offering their views on nanotech risks.

Berube rightly observes that we are plowing ahead with introducing nanoparticles to our bodies (as food additives), and to the environment, without much in the way of regulation or even understanding of the possible consequences.

Patrick Lin hits on everything from surveillance and privacy to human enhancement and nano-terrorism, and Mike trader focuses on the possibility of a new arms race.

Dietram Scheufele worries about the labeling of nanomaterials as the "asbestos of tomorrow" by some European media trying to stir up fear and controversy.

What's missing is the staunchly anti-nanotech opinion of a group like ETC. But for a brief post it's pretty comprehensive, offering a range of issues for you to worry about (maybe even do something about?) as we move into a nanotech future.