The Cylon home world has been discovered - it's Earth, and the Cylon nexus is Japan.
The Japanese drive to avoid the societal turmoil that often accompanies immigration has made them world leaders in robotic technology as they seek to develop robots to do the work of low-skill immigrants.
Their latest models are startlingly human-like.
Yahoo has a photo spread here, BBC has a story here, the Discovery Channel has a report here, and here's a YouTube video.