Check out wave.google.com

Lars and Jens Rasmussen, the original creators of Google Maps, will take the stage to unveil their latest project, Google Wave. As Lars describes it, "We set out to answer the question: What would email look like if we set out to invent it today?" This is an interesting piece of tech. It take over an hour to watch the video, but there are some interesting things there.
wave.google.com