In December 2004 I ordered an iPod for my son. The engraved and free shipping marvel traveled from China to NH (click to see that post) in about 6 days from order
September 19th I ordered the new iPod Nano, again with free shipping and engraving. September 22nd at noon the Nano showed up, having been customized and shipped all the way from China in less than 3 days!
Clearly a truly amazing performance for a mass customized (engraved) product, enabled by a superb supply chain collaboration between Apple and Fed Ex and of course the Impossibly Small size of the product itself!
As a runner I think the easy to use stop watch feature on the Nano is a useful bonus and a first for iPods.