The Microsoft Kinect has been a great toy for hackers (the good kind) and has allowed people to find new and interesting ways to make computer technology more useful. Early projects allowed computer controlled RC helicopters to fly autonomously and other great projects. The latest one however is a real benefit to many people.
Chinese researchers at the Chinese Academy of Sciences in conjunction with Microsoft Research China have used the Microsoft Kinect controller and Bing search to allow a computer to read and translate sign language in real time into computer text. Read more at CNET News.