Re: I'm officially grumpy! Audiobooks for visually impaired.

[Daniel Hill]

should have provided a link. 
http://wiki.s1mp3.org/Swan_proposal#Users.27_Interface sorry
Rock Box has voice support 
http://www.rockbox.org/twiki/bin/view/Main/VoiceHowto and
the cheap DSE mp3 players have a opensource firmware that mite have 
Voice in the future