Bill Machrone's articles in PC Magazine relating to disability and computers 

I Know You Talk to Bill Gates
Deaf communication with cell phones

Pocket PCs, smart phones, and similar devices can exchange e-mail from
anywhere, but they can't communicate with TTY/TDD machines, the standard
terminals for deaf communications. It would take an order from fairly high up
the chain to support the TTY protocol, which uses the old five-bit Baudot
code system instead of ASCII. 

Read the entire article at:
http://www.pcmag.com/article2/0,1759,1731012,00.asp

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The Sound of One Hand Typing

A one-handed keyboard is a viable solution to the unique challenges of typing
on a small device, but you have to teach yourself an entirely new skill
before you can use it. Several commercial one-handed keyboards are on the
market, and a great many more have come and gone 

Read the entire article at:
http://www.pcmag.com/article2/0,1759,1754187,00.asp