Besides the "lets sue AT&T" part this is THE smartest post I've read today thus far for the lack of this feature for a smartphone.
Apple prides themselves on accessibility options on OS X. However with over 6 Million USA citizens who are considered "legally" deaf (some 85% or higher?) and with several hundred high-schools dedicated to the hearing impaired this is a BIG deal!
However you need to consider the following:
AT&T's network blows chunks even for voice quality!
- remember AllThingsDigital 8; that iPhone 3GS user that cannot complete 1min of call time without being dropped in Arizona?!?? OUCH.
Can you really sign efficiently & effectively with 1 hand? (I don't know).
Lastly, at least your not stuck on the Sidekick, the ghetto BlackBerry!