To help you share your favorites links on Google Buzz, Google has rolled out Buzz Buttons. The new copy-and-paste Google Buzz Buttons will let you share interesting links from around the world without much effort. Just press the button and you are good to go! You can post links to Google Buzz even without leaving the site you’re on.
Some participating sites have already started using Buzz Buttons on their web pages. Also, a number of sharing platforms, including ShareThis, Meebo, Shareholic, AddThis and AddtoAny have incorporated the Google Buzz button into their sharing functionality. So, from now on, look for the Buzz button to easily share your links.
Want to add Google Buzz buttons to your web pages? Just go to buzz.google.com/stuff, select the type of button, specify other options and get a few lines of JavaScript. Copy and paste that code where you’d like the Buzz buttons to appear. That’s it! The Buzz button will appear on your pages, using which your visitors will be able to share stuff from your web site in Google Buzz.
Source: http://gmailblog.blogspot.com/2010/04/google-buzz-buttons.html