Reviews of Google Wave are out, and opinions are that it has potential as a development platform but is noisy to use for real-time communication. Robert Scoble calls it overhyped, claiming it's useful for little more than personal IM or small-scale project collaboration. He complains about the noisiness of tracking dozens of people chatting him at once in real-time and calls trying to use it a 'productivity killer' compared to simpler mediums like email and Twitter