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WP-Buzz is a plugin to put a post to your [Buzz] account everytime you publish a blog post. All you have to do is setup this plugin, enter your sitename,oauth_consumer_key,oauth_consumer_secret and your domain.

WP-Buzz

Send a post to your Google Buzz account everytime you publish a blog post.

Michael Henke

Insert SEO friendly/neutral links to social networks and bookmarking services. This plugin is proudly provided by <a href="http://www.all-things-seo.com" rel="nofollow ugc">all-things-seo.com</a>.
If you don’t know yet, find out what a <a href="http://www.all-things-seo.com/seo/seo-friendly-social-links/" rel="nofollow ugc">SEO friendly link</a> is. These Links can be inserted automatically above or below each post or manually (e.g. in the theme).
The plugin ships with support for Twitter, Facebook, digg, delicious, buzz, reddit, StumbleUpon, …extend the list by customizing your own services

SEO Friendly Social Links

Insert SEO friendly/neutral links to social networks and bookmarking services.

WP-Buzz vs SEO Friendly Social Links