MBooks: Google Books for Users with Visual Disabilities

Jessamyn West points to some information from the BLT Blog about MBooks, a project from the University of Michigan dedicated in part to making Google Books accessible for anyone with visual impairments.  There is an extra service available to UM students only (provision of full text material that is still in copyright).  In the comments section of West's post, Jennifer Sutton pointed to thsi article from the Braile Monitor which is also relevant: "First Step in Adding Accessibility to Google Books: Was It Enough?"  Very, very interesting - and something I would personally love to see done consistently by Google in a way that works for its users with various disabilities.  Individual institutions are filling in the gaps currently, but it would be great to see this tackled on a larger scale.