Site created to promote awareness about the need for accessible web design and to steer those who wish to learn more about the topic into the right direction.
A weblog about web accessibility and issues involving access technology at large, including but not limited to screen readers, operating systems and productivity software.
Disability simulator software that helps Web designers ensure that their pages are accessible and usable by the visually impaired. (IBM ID required to download.)
The US Dept. of Justice's resource page for the ADA. Voluminous, and not limited to computer and Internet issues, but at least it should be fairly authoritative, if you're willing to wade through the material.