Not much of a contribution to tech requirements or eliciting of needs, but a sort of "happy report" comes from:

Internet cafe opens for disabled users

The report is of a "first" setup, at a Goodwill Industries facility, of a place where persons with disabilities can go to get on and surf.

The "aids" reported seem relatively simple - there are many more sophisticated helper devices and programs that could be considered; but unfortunately many of the do-more things are probably out of reach financially for a place of this kind ... ... for now.

Borders and Starbucks could do this now ... (?).

John