Joe Clark's Answers -- in Valid XHTML

An extremely interesting but rather long read -- answers each question thoroughly and, there is plenty of discourse following the piece itself.

Clark, Joe. Slashdot (2002). Articles>Web Design>Accessibility>XHTML

XHTML Accessibility Tips

The library is committed to serving the entire public, and that means striving to ensure that all pages of our site are accessible to the greatest possible number of people and devices (including audio browsers, Braille readers, and other specialized browsing environments).

New York Public Library (2004). Design>Web Design>Accessibility>XHTML