[mFixman]

Remember Google Buzz? Google tried to copy Twitter and automatically added it to the front page of every Gmail account, fucked up the launch by having everything be public by default, and finally declared it a failed product and abandoned it a year later.

In retrospect, the whole thing was a mini-Google+.

[ttepasse]

If I remember correctly, Buzz would have had a certain interoperability with other services via open protocols. G+ then was mostly closed.