Google Friend Connect—Friend Connect allows webmasters to add social features to their sites by embedding a few snippets of code. We're retiring the service for all non-Blogger sites on March 1, 2012. We encourage affected sites to create a Google+ page and place a Google+ badge on their site so they can bring their community of followers to Google+ and use new features like Circles and Hangouts to keep in touch.
Now while this may sound like a catastrophe for all of us using the "Followers" feature on our blogs, the two are clearly not the same and I believe the key words here are "We're retiring the service for all non-Blogger sites..."
What this means to me is that if you're using the built-in "Followers" gadget that comes along with your Blogger blog then you're safe ~ no need to worry. The wording clearly states that this change only affects those who have this as an add-on for their non Blogger sites.