American Foundation for the Blind publishes a newsletter called Dots, and the fall issue recently came out
http://www.afb.org/Section.asp?SectionID=6&TopicID=19&DocumentID=5348
which includes an article about prison braille transcription programs. As it turns out, one of the major providers of braille is prison programs which train inmates to become braille transcribers.

There is also a phone number regarding National Braille Press's program to provide free braille books to young blind children and their families.