Access Matters is an interesting new site by Bob Easton:
Are practices and techniques developed several years ago still valid as web technology evolves? Designers and developers are continuously changing their techniques. As we move away from using tables for layout to using CSS for layout, what accessibility techniques need to be updated? This blog uses a quiz format to seek current best practices. Many, but not all, questions ask about techniques that can be used in designs using CSS for layout. I ask about specific situations and see how the best minds in the industry answer.