VoIP for Braille PDA named Voice Sense?
Although not really a VoIP or IP Telephony device, this could be a best way to give visually impaired people access to mobile computing, and of course a communication medium. Since it comes with all the tools packed in, like WiFi, Bluetooth, it will be simple(?) task to create a VoIP application.
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Geemodo: Braille PDA named Voice Sense
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