Well, accessibility awareness has hit the mainstream. The November 3, 2005 IBM Systems Journal is dedicated to accessibility.
As an author I just received my early copy. The article I co-authored covered accessibility requirements for users with vision impairments. Section 10, "Lessons learned - Microsoft Windows Today" covers the evolution of accessibility on Windows. Windows accessibility has evolved over time and it provides an excellent example of what can happen when a comprehensive accessibility architecture and strategy are not employed up front. Today, producing accessible solutions can be a very expensive proposition on Windows due to interoperability problems.
I look forward to reading the article entitled Semantic triage for increased Web accessibility since we are using semantic web concepts to address the accessibility of Dynamic HTML.