Creating Accessible Alternatives of Corporate Site
Another category of user to benefit from exceptions is persons with a "perceptual disability." This term refers to someone who has difficulty reading or hearing. Persons with a perceptual disability, or at the request of a person with a perceptual disability, or for a non-profit organization acting for his or her benefit, to copy a work protected by copyright in alternate formats such as braille, talking books or sign language. The exception applies unless a work in an alternate format is already commercially available.
Therefore, if a company has an inaccessible web site, you have the right to create an accessible version of their site. That's my interpretation, anyways.