Is your intranet discriminatory?
Websites are usually designed for a general audience. If a certain person isn't able to use it, often they can go and use another website.
With intranets, it's a different matter. Most companies require employees to use the intranet to some extent or other. If a company is providing an intranet that isn't accessible to people with a range of disabilities, that company may be guilty of discrimination.
In the US, the National Federation for the Blind is asking the Department of Justice's Civil Rights Division to probe whether New York University is discriminating against students and staff by forcing them to use Google Apps, a relatively inaccessible application. Similar complaints could be levelled at hundreds of other employers, using Google Apps or other systems.
For many companies, having an accessible intranet should be a much higher priority than an accessible website.