I'm now reading DMMT for the third time, and had made myself a note that last time I couldn't find the web article at useit.com mentioned on page 22. (This time my search found it. :-) )

But on DMMT page xi, you say: 

">  The Links.  if you want to visit any of the URLs mentioned in the book, you'll find up-to-date links on my site, too."

But - where on your site are the up-to-date links?

Cris