There are plenty of opportunities to participate in the GNOME Accessibility project, and they include things that non-technical people can do, too. For a list of items you can help with, please visit the GNOME Accessibility Goals and Roadmap page. Part of participating also includes bringing new ideas. If you have new ideas, please let us know on the mailing list or in the #a11y chatroom on irc.gnome.org.
For more general information on joining and participating in GNOME overall, please visit the Joining GNOME page as well as the page on obtaining a GNOME account. Please also don't be afraid to ask questions on the mailing list or in the #a11y chatroom on irc.gnome.org. We are a welcoming and friendly community -- no question is stupid.
DocumentationGNOME Desktop Accessibility Guide
The GNOME Desktop Accessibility Guide is for users, system administrators, and anyone else who is interested in how the GNOME Desktop supports people with disabilities from an end user point of view.GNOME Accessibility Developer's Guide
The GNOME Accessibility Developer's Guide is for developers who want to ensure their programming efforts are accessible to the widest audience of users.GNOME Documentation Library
The GNOME Documentation Library includes the accessibility user and developer documents listed above along with many other documents for users, developers, and system administrators. From here, you can also access the documentation translated into many different languages.