Programming Accessible Software on Java Phones?

LostSinner asks: "My mother, who is blind, called me recently and asked if I'd be up for a challenge. She is supremely fed up with trying to use her current cellphone (a StarTAC) and is looking for a new one. Recently, she has heard about the newer Java-enabled phones. She wants me to write a Java program which will allow her to navigate the menus, place calls, and generally use everything available to us sighted folks that she can't currently use. Though there are a few aftermarket pieces of software somewhat geared towards this, the price and the functionality (or lack thereof) are both sticking points... and what's the use of having a geek son if you don't get any benefits, right? I plan to release the code and either give the software away for free or charge a nominal fee for it. It's new ground for me, but I love a challenge. So, is a Java enabled phone the best way to go? Are there already phones out there with this functionality built in? If Java is the best way to go, what service provider and/or phones does Slashdot recommend? Thanks."