Americans With Disabilities Act Information
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.
http://www.usdoj.gov/crt/ada/

Usability First - Accessibility
Includes background information on Accessibility and lists computer related accessibility aids according to types of disability.
http://www.usabilityfirst.com/accessibility/index.txl

Viewable With Any Browser
Campaign for a Non-Browser Specific WWW. Resources, more information and links about this effort.
http://www.anybrowser.org/campaign/

WebAIM - Web Accessibility in Mind
Information, training, resources, guidelines and standards for Web accessibility and disability access to the Web.
http://www.webaim.org

Joeclark.org
Accessibility information and Weblogs from the writer Joe Clark
http://www.joeclark.org

Accessible Webpage Design: Resources
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.
http://library.uwsp.edu/aschmetz/Accessible/pub_resources.htm

Web Accessibility Survey
Some data collected on the accessibility of college and university web pages.
http://library.uwsp.edu/aschmetz/Accessible/websurveys.htm

Self Direction Community Project
Providing online disability awareness training.
http://www.selfdirection.org

Webdisabilities.com
Listing of web companies that have been awarded a kite mark for considering the disabled user.
http://www.webdisabilities.com/

Microsoft - Accessibility
Information about Microsoft accessibility products and services.
http://www.microsoft.com/enable/

UI Access
Resource for universal interface design and accessibility that provides techniques to support developing and implementing strategies.
http://www.uiaccess.com

Accessify.com
Tools, links and resources on Website accessibility.
http://www.accessify.com/

Accessible eLearning For All
The ALFA Project is being developed to allow educational content providers to create eLearning on any subject and in any language.
http://www.alfaproject.co.uk

AnitraPavka.com
Personal weblog with views on accessibility issues, news, and accessibility events.
http://www.anitrapavka.com/

AccessifyForum.com
Discussion forum regarding site building, news, and legal issues relating to accessibility.
http://www.accessifyforum.com/

SightWeaver
SightWeaver is a tool for repairing HTML tables, to make them more accessible.
http://www.mackers.com/projects/sightweaver/

The Alliance for Technology Access: Web Accessibility
Includes articles with many links to resources to educate and help with planning and creating accessible web pages.
http://www.ataccess.org/rresources/Webaccess.html

TechDis Accessibility & Usability Resource
Provides information on the technical and practical aspects of accessibility (including usability issues) and its evaluation, and information on how disabled users access the Internet.
http://www.techdis.ac.uk/seven/

Web Credible: Accessibility Resources
Offers tips, tricks, tutorials, links and information about Web accessibility, including UK legal requirements.
http://www.webcredible.co.uk/user-friendly-resources/web-accessibility/

W3 Compliant Sites
A collection of web standards compliant web sites and their designers.
http://w3csites.com

UsableAccess.com
Web accessibility and usability resources including articles, news, discussion, and research. Focuses on both theory and practice of user-centered design.
http://www.usableaccess.com/

The Guild of Accessible Web Designers
An association of organisations and accessible web designers and developers promoting accessible web design standards.
http://www.gawds.org

Web Page Accessibility Section 508 Checklist
Checklist of Checkpoints for Web Content Accessibility Section 508 Guidelines
http://www.egginc.com/navair-mac/checkList_508.html

alphaWorks : aDesigner
Disability simulator software that helps Web designers ensure that their pages are accessible and usable by the visually impaired. (IBM ID required to download.)
http://www.alphaworks.ibm.com/tech/adesigner

CNN: Web Sites are Locking out the Disabled
Office buildings have wheelchair ramps and TV has closed captioning, but many Web sites are inaccessible to people with disabilities. Things don't have to be that way.
http://archives.cnn.com/2000/TECH/computing/08/07/web.site.accessibility.idg/index.html

Library Hi Tech Volume 20, Number 2, 2002
Special issue: Accessibility of web-based information resources for people with disabilities. Read abstracts online; pay for access to full articles.
http://thesius.emeraldinsight.com/vl=6172910/cl=30/nw=1/rpsv/cw/www/mcb/07378831/v20n2/contp1-1.htm

Access Matters
Bob Easton searches for accessibility best practices.
http://www.access-matters.com/

Standards-schmandards
Weblog about web standards, accessibility and usability.
http://www.standards-schmandards.com

All About Access
A weblog about web accessibility and issues involving access technology at large, including but not limited to screen readers, operating systems and productivity software.
http://blog.carrolltech.org/

USPS Section 508 Handbook in HTML
Explains the requirements of Section 508 and sets forth, in broad outline, the Postal Service's policies on how to comply with them.
http://www.usps.com/cpim/ftp/hand/as508/welcome.htm

USPS Section 508 Technical Reference Guide in HTML
Technical Reference guide in support of USPS AS-508, detailing techniques and technical approaches to Section 508 and accessibility.
http://www.usps.com/cpim/ftp/hand/as508a/welcome.htm

Accessible Ireland
Aims to promote accessible design and enable website designers to receive feedback on their web sites from users, disabled and otherwise.
http://www.accessibleireland.net

Searchenginewatch - Don't Disable Your Site for Handicapped Users
Article by Matt Bailey. Designers of web sites that are not accessible to disabled users are overlooking a market segment of millions of searchers and potential buyers.
http://searchenginewatch.com/showPage.html?page=3506256

Business Benefits of Accessible Web Design
Describes the many business and technical benefits that are realised by applying the Web Content Accessibility Guidelines (WCAG) to Web applications.
http://www.w3.org/WAI/bcase/benefits.html

IBM Human Ability and Accessibility Center
By enabling human capability through innovation, the center strives to help people with disabilities maximize their potential.
http://www-306.ibm.com/able/

RNIB Web Access Centre Blog
News and announcements from the UK's Royal National Institute for the Blind.
http://www.rnib.org.uk/wacblog/feed/atom/

Web Accessibility Toolbar for Opera
Browser add-on from the Web Accessibility Tools Consortium providing useful tools and validation links. Documentation and free download.
http://www.paciellogroup.com/resources/wat-about.html

Wikipedia: Web Accessibility
Encyclopedia article about the topic, including discussion of benefits, technology, guidelines, and legal provisions.
http://en.wikipedia.org/wiki/Web_accessibility

WCAG 2.0: Woeful to Wonderful in One Easy Draft?
Accessites.org article by Jack Pickard, providing a review of the latest changes to the working draft.
http://accessites.org/site/2007/05/wcag2-woeful-to-wonderful-in-one-easy-draft/

hAccessibility
Article by Bruce Lawson and James Craig, raising accessibility issues with the use of some microformats, and specifically the abbr design pattern.
http://www.webstandards.org/2007/04/27/haccessibility/

RNIB Web Access Centre
A free online resource centre to help designers and managers create accessible web sites. Also links to consultancy services.
http://www.rnib.org.uk/xpedio/groups/public/documents/code/public_rnib008789.hcsp

Philippine Web Accessibility Group (PWAG)
A non-profit association of web designers and advocates of web accessibility based in the Philippines. Membership information, resources, and frequently asked questions.
http://www.pwag.org/

Google Groups: Accessible
Forum for users of Google's accessibility services to share tips on what works well and what could be made better.
http://groups.google.com/group/accessible/

Accessify: Latest News
Feed from Accessify.com with news on all aspects of web accessibility.
http://accessify.com/news/feed/