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Converging instant messaging, email, forums, chat rooms, photo sharing, social networking, and web collaboration, Google Wave will change the way we communicate. Conversations are all trees on a shared host, so you are never creating new copies of content as you reply to and share messages and other content. You just add people and content to the conversation. Everything is always in sync live because it is a hosted conversation, not content being sent to people’s inboxes. It’s open source and you can create your own Wave client and embed Wave in your own applications.