Re: *shakes head*
If there isn't a legal requirement then I can't see why there shouldn't be one. It's a mass market product.
There are legal requirements for website accessibility. By developing this form of accessibility into the IPhone no one else is being disadvantaged. The cost of doing so is not prohibitive - so there's no reason why this section of disabled people should be refused use of the device.
Let's also face it - all smartphones are shops in their own right.
A 2 seater sports car is slightly different in that it is probable that with current technology you would end up with a completely different product in order to be able to produce it and cover all possible disabilities. It's not currently feasible (although that may change).
Regardless of whether someone has bought one already or not it's not an unreasonable request for the device to be made accessible. Beyond legal requirements - it's surely the morally correct thing for such a company with the resources like Apple to do - they could have it out by next month and the costs would not even show up on their bank balance!