UPDATE AND WARNING 23/04/13
DO NOT ADD THE GOOGLE+ COMMENTS SYSTEM TO YOUR OWN WEBSITES WITHOUT FIRST READING ABOUT THE IMPLICATIONS
This is especially important if you intend using a WordPress plug in.
1. You have very little control
2. The Google+ Comment system displays Shares too
3. The Google+ Comment System is retrospective (any share made since day 1 of Google+ may appear on your site)
4. People can add anything to your site and you will receive no notification
5. This could happen to any post you have ever made on your Wordpess site
6. You will have to carefully monitor every single page that you have the Google+ Comments system on.
7. When people comment they like to receive a reply, you will receive comments without even knowing so how can you reply?
8. If you are replacing an existing comments system you may be removing comments from your posts, if any of these were keyword rich you may start losing rankings (especially for long tail searches)
9. AND MOST IMPORTANT The Google+ Comment system is currently devised for Blogger posts, when an author writes a post on blogger they have control of the comments, once the system is added to WordPress there is no Blogger author and you lose that control of the comments.
BE VERY CAREFUL IF USING GOOGLE+ COMMENTS ON YOUR OWN WEBSITE
END OF UPDATE
Before going any further I must point out this is totally unofficial and not in any way endorsed by Google.
This isn’t really intended to be used, it is just a demonstration showing how to add the Blogger Google+ Comments system to WordPress posts (or any other site for that matter)
You will need a blogger blog for this to work, it doesn’t have to be an active one, you can just start one for this purpose if you like.
Instructions for adding the Google+ Comments System to WordPress Posts
(This assumes you already have a Blogger blog)
1. Think about the post you are going to make on WordPress.
2. Make an abridged version of the post on Blogger
3. Enable Google+ Comments on Blogger
4. Copy the code from the Google+ comment on blogger (view source and copy the content of div class = contents.
5. Make your full post on your WordPress site.
6. Change to text mode and paste the Google+ Comment code at the end of your post.
7. Publish post.
You will now see that the comment system is directly under your post.
How this actually works is people think they are commenting to your WordPress post, when in fact they are commenting to your abridged version on Blogger.
The final little trick (which is optional) is to redirect the individual blogger post from the post to your WordPress Post.
Please feel free to ask if you have any questions.
If you don’t want to make the abridged post on Google+ you can now make it so the comments are direct to the Post or Page by editing comments.php, adding the comments code in there and using the WordPress permalink as the URL
Post a Comment Using Google+
If you do not have a Google+ Account please use the old comment system at bottom of page (it may take a few hours before I approve it though)