Yes! The ADA established the concept of a civil right to effective communication. 

This underlies the idea that access to information is a civil right. This means that the ADA does apply to cyberspace. Since web based presentation of information is often the very best means of communication, ADA legislation guarantees accessibility to websites under the effective communication guarantees of the law.  Section 508 creates an incentive for private and public organizations to create accessible websites by requiring anyone doing business with the government to comply with the Section 508 accessibility standards.  The ADA and Section 508 compliment and reinforce each other.    

In terms of Section 508, an accessible website is one that meets the standards specified in the law.  These standards assure that disabled people using assistive technology can navigate the site.  Because technology is constantly evolving, accessibility standards must evolve as well.  In order to coordinate the effort to create accessibility standards, the World Wide Web Consortium (W3C) has created the Web Content Accessibility Guidelines (WCAG).  These guidelines are more extensive and complete than the standards established by Section 508.  Another important aspect of accessibility is the general usability of a site.  508 and W3C standards promote all coherent navigation, legible presentation, complimentary colors, and consistent layout.  These are traits that benefit all users.