Google+ comments for WordPress is something I looked forward after the launch of Google+ commenting system for Blogger. This WordPress plugin uses the Google plus comment system that’s used in Blogger and this is not an official plugin from Google.
How to add Google+ Comments to WordPress
Step 1: Download and install the plugin to your WordPress.org blog or Go to Plugins > Add New and search for “Google+ Comments” and then install the plugin.
Step 2: Once activated, you can see both Google+ and WordPress comments in tabs. I would call this a smart option instead of just replacing the existing WordPress comment system and the comments.
With Google+ gaining more popularity among bloggers, this plugin would definitely take blog commenting to the level on WordPress.org blogs and I hope it does.