Check out this post over at Sentient Developments.
He reviews a book called Wired for War: The Robotics Revolution and Conflict in the 21st Century
by P W Singer.
From the blog: It's no secret that the U.S. military is developing a variety of unmanned weapons and seemingly futuristic technologies -- everything from automated machine guns and robotic stretcher bearers to tiny but lethal robots the size of insects.
As these weapons gain more and more autonomy, deeper questions arise. Singer poses difficult questions: "Can the new armaments reliably separate friend from foe? What laws and ethical codes apply? What are we saying when we send out unmanned machines to fight for us? What is the “message” that those on the other side receive?" And ultimately, asks Singer, how will we remain masters of weapons that are immeasurably faster and more "intelligent" than we are?
Gee, you think that could be a problem?