As someone who's done a fair amount of work in materials science and "nanotechnology", I have to admit there are some valid points in here. Drexler-type nanobo

As someone who's done a fair amount of work in materials science and "nanotechnology", I have to admit there are some valid points in here. Drexler-type nanobots are still just as far away as when he wrote his book, and a large amount of the "nanotechnology" work out there is called such mainly to get funding. But the author here overstates his case quite a bit. "Millitech"? There are many microscale mechanical systems out there, both in the lab and in industrial applications. Accelerometers are one example; the actuated mirrors in DLP projectors are another. If there's no microtechnology out there, I know a lot of MEMS engineers who are going to be surprised to here it. A lot of what's called nanotech now could have been called physical chemistry thirty years ago, especially a lot of the "let's put nanoparticles in it!" projects out there. But there's some pretty real nanotech out there too, even if it doesn't qualify under the self-replicating nanobots definition. One example I can think of is the work being done on nanoscale printing--not lithography, but actual physical printing of materials into nanoscale patterns. And there's some pretty cool controlled nanoparticle engineering work out there too.