Universal Access is the category in Apple's OS X operating system to tune the system for the hearing and vision impaired. Designing and developing software that can be used by the maximum number of people not only is the right thing to do but also makes good business sense.
A great web site to familiarize yourself with what is available is http://www.abilityhub.com/.
Do you regularly design and develop software and systems that takes into account Universal Access? Do you know of other resources for folks interested in Universal Access? Please share your thoughts with the group!