"circa 2015-2025 when personal nanofactories have been developed and are used extensively"
http://positivefuturist.com/archive/124.html

http://www.amazon.com/Diamond-Age-Illustrated-Primer-Spectra/dp/0553380966/ref=pd_bbs_sr_1/105-7433527-3747665?ie=UTF8&s=books&qid=1191729935&sr=8-1 - nanofactories