When i logged in to my GMail account, i got a new notification saying  that i already have a chance to enable Google Buzz on my GMail account.  Of course i activate it since i'm a bit curious about it. After i enable  it, there's a new option called Buzz under Inbox link on the left side  of my account and i can add many sites which relates to me so that my  post from every site i added will be available on my buzz.
IMHO,  Google Buzz is working like Google Wave + Google Reader combined as one  application and integrated in GMail. It's a place where you can share  everything with others, but in terms of social networks. You can add  Twitter and Flickr (besides Google's site such as Blogger and YouTube),  but not yet for Plurks. I'm waiting for Plurk to be added to Google Buzz  as it's my favorite social network site for now.
Oh well, as  always Google always put something interesting on each of it's products
