Accessibility is an important goal for any Content Management System that aims to support as many users as possible. There is a lot to learn to meet not only the legal guidelines for web accessibility but also the vision that guides such legislation.
In mojoPortal I have gone to significant efforts to make everything accessible from the back end site administration to public facing features. I am committed to learning as much as I can about the issues and the recommended solutions for those issues as possible in order to continually improve mojoPortal and make it more accessible.
You will generally find that all site features and administration in mojoPortal can function even with javascript disabled, though obviously without the benefits of javascript wysiwyg editors. Compare this to our competitors like DotNetNuke or Umbraco and you will find that you can do practically nothing with them as far as site management when javascript is disabled.
I am a member of The Guild of Accessible Web Designers
See my profile on gawds.org
For developers interested in techniques for accessible design, I'm starting a list of resources. If you know of good links to helpful resources let me know.