I found a post from someone who's discussing the use of the OLPC XO laptop as assistive technology for disabled persons in developing countries. I had to look up the term AAC, which I hadn't encountered before -- it's "augmentive and alternative communication".
OLPC + assistive tech for disabled persons = an idea whose time has come. I already have been thinking about the uses of a ruggedized, spillproof, portable device like the XO for persons like my friend Joe J, whose fine motor control is limited and who frequently needs to replace computer keyboards as a result of the additional wear-and-tear his condition causes. But for him to be able to use it, the XO would need a screen reader capable of interfacing with his braille display. XO-compatible screen-reading software isn't in existence yet, but if there's a demand for it, I'm certain that it soon WILL be.
I'm bookmarking the assistive-tech blog. I'm glad to see that there are others, who WORK in the assistive-tech field, who've been thinking along the same lines as me.