I read "Web 2.0 & Accessibility for Disabled" posted by Kathryn Dove... I found the following checklist to be very helpful for Web 2.0 and people with disabilities:
Support accessible authoring practices
Generate standard mark-up
Support the creation of accessible content
Provide ways of checking and correcting inaccessible content
Integrate accessibility solutions into the overall "look and feel"
Promote accessibility in help and documentation
Ensure that the authoring tool is accessible to authors with disabilities