I recently wrote a piece on robotics and artificial intelligence that complements this conversation.
http://www.21stcentech.com/robotics-artificial-intelligence-update-machine-ethics-laws-robotics/Philosophy professor David Gunkel has written a book, "The Machine Question" that looks at our relationship with robots in the near future. And the work being done at University of Connecticut and University of Hartford on machine ethics should lead to a breakthrough in robot-human interaction.