For those of you (like me) who are interested in Accessibility and/or need to ensure your websites remain in compliance with section 508 you'll be interested to know that the Web Content Accessibility Guidelines 2.0 was published as a W3C Proposed Recommendation on Nov. 3, 2008. This means that the technical material of WCAG 2.0 is complete and it ...

V1 of the IE Developer Toolbar is available.  One of the many features that Public Sector developers will find useful is a Section 508 checker.  More here. -Marc

I just came across this recently published article.  A significant portion of it covers accessibility.  You'll also want to download the Writing Accessible Web Applications document from MSDN Downloads.  The document talks about accessibility with AJAX. -Marc