I think we need to specify what we need more. Looking at techniques, they are all based on current toolbars. Allow the user to search for rendered text content, including text equivalents of visual and auditory content. If it's rendered for some people, it must be rendered for all people. They have image loading turned on and can't turn it off.
Some clients are downloadable that can only be configured by the sysadmin.
It's not the application that has the problem, it's the policy. I agree it's not the UA's responsibility to make up for bad management. If the requirement is only rendered text, we need to highlight this in the AT appendix. Today, no one has access to it. Netscape gives you an information page.