Most people have heard of or even tried screen readers like Jaws. The problem with software like Jaws is that it must be installed and run on the computer a visual impaired person is using. This can be inconvenient if someone is traveling, or is otherwise away from home or work.
WebAnywhere is different in that it is web-based, so there is no software to install. Any computer can be made more accessible to the visually impaired as long as it has a browser. The software that runs WebAnywhere is available for review from Google Code.
This sounds like an outstanding project — I’ll have to pull the source code down and take a look at it.