More about Apple
Heiko pointed me to this article about Apple's next OS, Leopard:
7. Accessibility improvements
Apple is working to dramatically improve how well Leopard will work for people with disabilities, and they certainly deserve some credit for this work. Leopard will new voice technologies, Braille support, positional audio cues, and extended keyboard capability, in addition to closed captioning. The voice feature seems like a decent improvement, but didn't sound any better than Vista's voice synthesis to me (Jobs played both side-to-side during the keynote).