This plugin (widget ready) allows you to retrive latest feeds from Google Buzz service. It has some advanced options like caching

Noted That:

To install correctly this google-buzz-feed.zip.
Fisrt Download the google-buzz-feed.zip to your computer
Extract/Open google-buzz-feed.zip to Your Computer.
Then, Find readme.txt file inside google-buzz-feed.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "google-buzz-feed.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "google-buzz-feed.zip" Downloaded plugin from your computer, Where you downloaded google-buzz-feed.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Google Buzz" folder is added on left sidemenu. Now, Click on "Google Buzz" folder.

Noted that: If you do not see "Google Buzz" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Google Buzz Configurtions and Settings or How to work "Google Buzz" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Google Buzz" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Google Buzz
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Upload `buzz.php` to the `/wp-content/plugins/` directory Activate the plugin through the ‘Plugins’ menu in WordPress After activation, inside Plugins menu you will see ?Buzz configuration?. Click on it and set up details: Google Buzz Username, Caching in minutes (for default set 1),response time in seconds (5 for default), number of posts to fetch To display it go to Appereance->Widgets and from there drag Google Buzz Widget to your sidebar or where you want to display feeds (note that here you can also setup Buzz plugin) You can also place in your templates

Upload buzz.php to the /wp-content/plugins/ directory
Activate the plugin through the ‘Plugins’ menu in WordPress
After activation, inside Plugins menu you will see ?Buzz configuration?. Click on it and set up details: Google Buzz Username, Caching in minutes (for default set 1),response time in seconds (5 for default), number of posts to fetch
To display it go to Appereance->Widgets and from there drag Google Buzz Widget to your sidebar or where you want to display feeds (note that here you can also setup Buzz plugin)
You can also place in your templates

some, service, advanced, options, caching, like, buzz, google, ready, widget,

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Reffered: https://wordpress.org/