Not Google Wave. They actually announced Wave’s impending cancellation.
“But despite these wins, and numerous loyal fans, Wave has not seen the user adoption we would have liked. We don’t plan to continue developing Wave as a standalone product, but we will maintain the site at least through the end of the year and extend the technology for use in other Google projects.” (from Google Blog)
This really stinks, Google. I’ve begun to really on rely and evangelize Wave. It’s true that it took me a long time to understand it and had to do a good deal of convincing of other people to use it. For me it has been great.
Will I be able to live without it? Sure, nothing is irreplaceable. Google Buzz, on the other hand, lasted about 2 weeks with me. It was truly useless.