What if your site is perfectly accessible but no one knows about it?
This question came up while working on Accessibility improvements for vertical tabs , together with some first thoughts on this issue.
This has always been the problem with access keys and other kinds of "invisible" (i.a. not Point&Click) navigation.
Gez Lemon made that into a Greasemonkey User Script to Manage Access Keys.
I'm wondering how we could provide some of this functionality in Drupal.