Many hearing-impaired people use email and text messaging to communicate. Some, I'm sure, are using 3G wireless phones equipped with video cameras to communicate via sign language. Great idea, but high cost and battery life are real problems that are a bottleneck to wide adoption.
A team of engineers from University of Washington in Seattle and Cornell have just about completed a functional prototype, they dub 'mobile ASL (American Sign Language)'.
I applaud this initiative to extend the value of hyperconnectivity to more people.