This is long overdue – you can now configure your Facebook account to use HTTPS/SSL when you log in. This is the same sort of security many of your other accounts use (e.g. all banks and credit cards). I say this is long overdue since services such as Google Mail implemented this maaaaany moons ago. Better late than never?
However… at least for me this setting is not showing up. Presumably it is rolling out over the course of the day. So YMMMV.