So what's all the buzz about? You'll be able to tag and follow your contacts at a whole new level. The system allows users to "like" or "dislike" status updates as they come in, and then over time, Google Buzz will know to ignore posts you're not really feeling. You'll also be able to tag your updates as public (for all of your followers) or private (just your favorite peeps).
Anything you post in public Picasa or Flickr albums, on YouTube or in Google Chat status updates will automatically appear as streamlined thumbnails or posts in Buzz (but you can edit privacy settings, if you're not down with this). The tool can also be integrated with Twitter to pull in tweets from people you follow there. You won't be able to tweet from Google Buzz, though, and there isn't a hook up to Facebook at all.
Google Buzz is slowly rolling out to Gmail users this week. We have to play with it a little more before we can say whether it's cool or not, but if you're already a big fan of Google tools, you'll probably love Google Buzz. Check out a more in-depth look at all the features below.