I was anxiously waited for Google wave invitation from its initial preview release. When I finally got one, I wasn't really impressed with it. The only thing interested to me was the UI. Though they mentioned that the email system is outdated they must have been realized by now how hard is to kill the old email system.-- "Email" is the mostly used feature in Internet followed by "Search". I'm not criticizing it, but I feel Wave is too early. However, it's future is still a mystery.