Google Wave is the Segway of email
By far the worst part is the IM in the middle of otherwise static data. I can see how archived conversations all in one place are good, but Wave's busy UI means that I can't keep more than one IM-like conversation going. That's something I can easily do with any IM client.
Also, the watch every character as it's typed is horrible. Especially when the person on the other end is a poor typist.
I can also see how reach editable, email is nice to have. But I'm not sure trying to put this all together is the answer. Yes, I like IM with my colleagues for real time stuff. Yes, I like shared documents. Yes, I like the store and forward nature of email.
But making a single stew out of them all seems like a mistake.
Would love to hear HN users' thoughts.