sure, i'm really curious too.
i anticipated that question so i did some homework. there is text to speech software such as:
JAWS for Windows,
Screen Reader For OS/2,
OutSPOKEN for Windows,
Kurzweil 1000 OCR Scanning and Reading Software.
there are also braille printers and haptic devices:
Braille printers are available for those who can read Braille. These produce a hard copy and can do so from various computer devices. Other Braille Display technology allows what is displayed on the computer screen to be transposed into Braille. These devices operate by raising and lowering different combinations of pins electronically to produce what appears on a portion of the computer screen. They are refreshable, that is, they change continuously as the user moves around on the screen. (American Foundation for the Blind, 2000, n. p.)
A haptic interface is a device which allows a user to interact with a computer by receiving tactile feed back. It is a force reflecting device which allows a user to touch, feel, manipulate, create, and/or alter simulated three-dimensional objects in a virtual environment (Office of Training Technology, 2000) Haptics was first developed so that users could feel objects in virtual environments. It is still a relatively new technology and may broaden the interaction between computer-stored information and blind or visual impaired people when the technology and training required become more freely available (Brewster, 2001, n. p.).