Google Buzz was created in 2010.
Google Buzz ended in 2011.
Yes, Google buzz is discontinued on November 24th, 2011.
Well, what happened is another company bought Google and they put down Google buzz and started Google+.
It is probably because they have created Google+. It is like Google Buzz but better and like Facebook but for Google.
Google Buzz is free. All you need to do is to create a Google account.
Yes, it is. Google Buzz is all about sharing the favourites within the group and recommending these for the public. Google Buzz Icon, if pressed, is followed by your gmail account. Google buzz icon can be integrated through downloading API from Google's Webmaster Tool. Yahoo has also buzz.
You can't anymore because Google discontinued Google Buzz in Oct 2011.
It is ultimatly because Google violated privacy regulations. This lead to a lawsuit and Google has decided to shut down Google Buzz.
They are very different websites Google Buzz is just for you and your friends, whereas twitter is for the world to see and you can follow famous people easily, but google buzz works much better with just your friends. Google buzz is also much safer.