How many use those features? So there's an indication of how many will use Buzz.
I use google-talk within gmail on a regular basis. All of our documents are in google docs. My calendar (both social and work) is a google calendar.
While I'm not terribly interested in buzz, I'm not about to write it off simply because I'm not interested.
The articles assertion that it's doomed by its API is just ludicrous. Twitters API is rather simple and plugging in yet another social network API hardly seems like a big project at this point. They're all pretty well abstracted out at this point.