I just spoke at DrupalGov last week about Prioritising web accessibility in the build of a web site. Feel free to download the slides. There are three formats (please note only the Word file is fully accessible):
Gian Wild has been working in accessibility since 1998. She worked on the very first Australian accessible web site and was the accessibility consultant for the Melbourne 2006 Commonwealth Games. For six years she was actively involved in the W3C Web Content Accessibility Guidelines Working Group.