This is an excellent article from Luis Perez who provides Technology Integration Assistance at the University of South Florida. Luis who has a visual impairment himself has used his own situation as an opportunity to assist others with impairment or who teach students with impairments to make the most of available technology. In his article Overview of New Accessibility Features in iOS 5 Luis steps us through some of the features we should be taking advantage of.
Read the full article here: Overview-of-new-accessibility-features-in-ios-5
Check out Luis's Website for a great list of resources: http://luisperezonline.com/portfolio/