Great news. Blogger.com bloggers like myself are getting access to HTTPS by default.
What does that mean?
It means that all visitors will be able to view your Blogspot domain blogs over an encrypted connection by visiting https://<your-blog>.blogspot.com. Existing links and bookmarks to your blogs will continue to work. As part of this change, the HTTPS Availability setting will go away, and your blogs will always have an HTTPS version.