You must be in a hurry to add Google Buzz button to your WordPress Blog. Here is a plugin by Arpit Shah that will easily add a Google Buzz button to your WordPress Blog.

There are options to display button after or before the content and different Patterns of Google Buzz Button to choose from.
To install this Plugin, just search for the keyword ‘wp google-buzz‘ in the Plugin Directory. You will find Arpit Shah’s Plugin in the first line, click on install and activate the Plugin.

A tiny Google Buzz button will be added to your Blog Post, letting your Blog Visitors to share articles via Google Buzz.

To adjust Google Buzz Icon Size and Position, just go to Settings > Wp-Google-Buzz. Here you will find options to adjust Google Buzz Button size and Stylish Google Buzz Icons to choose from.