Government of Canada: Accessibility - - Official standards and guidelines for Government of Canada Web sites, as part of the Treasury Board's "Common Look and Feel" initiative.
Section508.gov - - Official website for Section 508 of the US Rehabilitation Act.
WCAG Samurai - - A group of developers, led by Joe Clark, that worked on corrections for, and extensions to, the Web Content Accessibility Guidelines 1.0. Includes published errata, and links to independent reviews of their work.
Web Content Accessibility Guidelines 1.0 - - Recommendation from the W3C, which explains to developers and authors how to make Web content accessible to people with disabilities.