As I reported in October in 2011, and others picked up on about five months later, Google would be launching a Google+-based comment platform for blogs.
Today, Google made the announcement, but it's only for Blogger blogs, at least at this point. The feature can be enabled from the Blogger dashboard.
"Now when you're browsing your blog's comment threads, you'll see activity from direct visitors, and from people talking about your content on Google+," says Google Principal Engineer Yonatan Zunger . "For example, if there's a public Google+ discussion about one of your blog entries, those comments and replies will also appear on your Blogger blog. This way you can engage with more of your readers, all in one place."
"Your blog readers will now have the option to comment publicly, or privately to their circles on Google+," adds Zunger. "And when they're browsing blog comments, they can view all of them, just the top ones, or only those from the people in their circles."
Everyone will, of course, only see the comments they have permission to see.
Facebook has had a similar offering for quite some time, and it's a bit surprising that it's taken Google this long to offer something, and still only for Blogger.
You can see the feature in action here.