Has anyone here heard of this before? I just found out about it yesterday and it looks amazing. Basically, it is the future of email/online collaboration. Instead of having individual emails, docs, and conversations, you have waves which can function as all of these and probably more as I haven't finished watching the demo video yet.
You can check out the homepage for it here: Google Wave Preview
It's supposed to come out later this year, I am looking forward to it. Google is taking over the world.