This document discusses Google Wave and how it aims to improve on email for collaboration. Google Wave allows real-time communication and editing of shared documents. It enables instant messaging and inclusion of multiple participants. Unlike email, Wave lets users see conversations as they happen and add tools like documents and spreadsheets directly. Wave is also open source so third parties can create applications for it and corporations can host their own servers independently of Google. The document speculates Wave could replace email by facilitating more effective group communication and collaboration.