To delve a bit deeper, here is the exact wording for this change from the Official Google Blog and their November 22nd posting of last year...
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.
Enjoy~