An anecdotal little piece from The New York Times about the iPad as an enabling device for a young boy with a motor-neuron disease:
Owen, 7, does not have the strength to maneuver a computer mouse, but when a nurse propped her boyfriend’s iPad within reach in June, he did something his mother had never seen before.
He aimed his left pointer finger at an icon on the screen, touched it — just barely — and opened the application Gravitarium, which plays music as users create landscapes of stars on the screen. Over the years, Owen’s parents had tried several computerized communications contraptions to give him an escape from his disability, but the iPad was the first that worked on the first try.
There are also some interesting insights about the adoption of the device amongst different groups of disabled users:
For a mainstream technological device like the iPad to have been instantly embraced by the disabled is unusual. It is far more common for items designed for disabled people to be adapted for general use, like closed-captioning on televisions in gyms or GPS devices in cars that announce directions. Also, most mainstream devices do not come with built-ins like the iPad’s closed-captioning, magnification and audible readout functions — which were intended to keep it simple for all users, but also help disabled people.