Google Wave: Re-inventing e-mail.
People behind Google Maps are doing it. Application is open source.
He proposed this thing called “hosted conversations” (this is what we call waves now). He listed them in a big series of benefits over existing systems. The thing that caught me was with these hosted conversations, you could do both email type conversations and instant messaging type conversations, in the same tool.
A core part of the product is the “liveness.” And you can see what people are doing all the time. Waves become active and unread and pop-up in your search panel all the time, and you need to learn when that’s useful for people and when it’s not, and how to present information to them in a way that’s useful and so they know what’s important and what to deal with