a. websites
www.zyvex.com/nanotech/feynman.html
There's Plenty of Room at the Bottom: An Invitation to Enter a New Field of Physics. This transcript of the classic talk that Richard Feynman gave on December 29th 1959 at the annual meeting of the American Physical Society at the California Institute of Technology (Caltech) was first published in the February 1960 issue of Caltech's Engineering and Science, which owns the copyright. It has been made available on the web at this site with their kind permission.

unisci.com/stories/19993/0909991.htm
Enzyme Molecular Motor Runs For 40 Minutes. Coupling the organic and inorganic, biological engineers at Cornell University have demonstrated the feasibility of extremely small, self-propelled bionic machines that do their builders' bidding in plant and animal cells, including those in humans.

unisci.com/stories/19991/0115991.htm
Molecular Machine Built From Synthetic DNA. A team of researchers led by award-winning New York University chemistry professor Nadrian C. Seeman have built a machine from DNA, the genetic material of all living organisms. Constructed from synthetic DNA molecules, the device has two rigid arms that can be rotated between fixed positions.

www.zyvex.com/nano/
The next few paragraphs provide a brief introduction to the core concepts of molecular nanotechnology, followed by links to further reading.