Also, it's interesting to follow what's going on at the WAI regarding the ARIA project (
http://www.w3.org/TR/wai-aria/). ARIA stands for Accessible Rich Internet Applications and "
...defines a way to make Web content and Web applications more accessible to people with disabilities. It especially helps with dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies.".
There's a news about the new WAI-ARIA documents published recently (4-feb-2008) at the WAI homepage (http://www.w3.org/WAI/).
