Today when I visit yahoo buzz home page found Yahoo! Buzz will be discontinued as of April 21, 2011.
After the biggest success of digg, yahoo started their social bookmarking service buzz in 2008. Yahoo buzz is similar to digg social bookmarking service to aggregate what news stories are ‘buzzing’ on the web. It never really took off and clearly Yahoo felt that it was no longer worth maintaining.
According to a message on the Buzz website: Yahoo! Buzz will be discontinued as of April 21, 2011. As of this date, you will be unable to access the Yahoo! Buzz site. This was a hard decision. However this will help us focus on our core strengths and new innovations. We appreciate your patronage. The Yahoo! Buzz Team.
Source : Yahoo