I found Maria 's post on apps for students with Astiun, since I currently have 2 students in my classes that do not communicate. This really looks like something that these students could use and make their lifes easier.
In his book on new forms of personal expression and communication on the Internet, The Future of Reputation, Daniel Solove reminds us that "people scattered across the globe can now all congregate together in cyberspace" (2007:33). This article looks at how tweeter can be adapted to meet the needs of the the disabled and alow access to everyone.