Some new surveys of how people with disabilities use the web have just been launched by WebAim:
In the spirit of our popular screen reader user surveys, WebAIM has
launched two new surveys a Survey of Users with Low Vision and a Survey of Users with Motor Disabilities. We invite all individuals with these disabilities to complete these brief surveys.
The aggregate results of these surveys will be released publicly and will be used to inform design and development choices for those creating accessible web content. The surveys will remain open through March 15th.
You can also read up on their latest finding in their Screen Reader Survey 2012.
Thank you WebAim