Recent article: HTML Articles
The truth is that people with disabilities should be able to benefit from the same tools as everyone else. And I suppose that Google's purpose is to merge its Accessible Web Search into the standard Web search one day. More and more webtrepreneurs understand the importance of valid codes and accessibility, but till the day comes when the Web will run on smooth paths, we still have a long time to wait. In the meanwhile SEOs will introduce a new SEO service in their menu: HTML validation. I confess, I practice what I preach since 2004. It's my understanding of "web optimization." I also try to address the main accessibility issues on each site I work on, and make each and every page pass the automatic Cynthia validation.

Google's guidelines on accessibility (still under development) will probably not be as strict as those of the W3C Web Accessibility Initiative (WAI), but they'll still make a difference for the impaired users.