The thread was kind of dead, so I decided to start a new one...but as a deaf person, I thought I would answer some of the questions related to deafness.
Many deaf people have vibrating alarm clocks that they put under their pillows. Some have this
http://www.harriscomm.com/index.php/sa-sbt425ss.html There is all kinds of technology for deaf people these days. i have a videophone, which I can use to call anyone. it has a camera, and I can see a sign language interpreter on my TV screen. So I sign what I want to say, the interpreter voices for my and signs back what the other person says. It's called video relay service (VRS).
http://sorenson.com/services/ I can also use my videophone to call other deaf people directly and we can see each other on our TV screens.
They even make baby monitors with cameras now, so deaf parents can see the baby on a handheld screen instead of listening to monitors. I also have a smoke alarm with a flashing lights and a doorbell with lights too.
People who are deaf and blind communicate through tactile sign language. Basically, they feel what you are signing by placing their hands over yours while you sign. Here's an example:
http://www.youtube.com/watch?v=l8yXWactj38Some deaf people can lip read well (like me), some can't. Some can speak well, some can't. Some feel comfortable using writing to communicate with hearing people, some are more adamant about needing interpreters. Each person is different based on how much residual hearing they have left, how comfortable they are with the people they are with, how well they can lipread, if they can benefit from hearing aids or not, if they were born deaf or became deaf later in life etc.
Just wanted to share! I don't post often, but I feel like when I do it's about being deaf most of the time...so sorry if I'm becoming redundant, but since people were wondering just thought I'd chime in.