Don't fear the grey goo

Nanotechnology pioneer slays 'grey goo' myths (EurekAlert - Social/Behavior):"Eric Drexler, known as the father of nanotechnology, today (Wednesday, 9th June 2004) publishes a paper that admits that self-replicating machines are not vital for large-scale molecular manufacture, and that nanotechnology-based fabrication can be thoroughly non-biological and inherently safe."
But he's only just decided that? Read The Diamond Age by Neal Stephenson for hyper nano sci-fi wonder.