Just to let everybody know it seems Facebook has finally activated the option of turning on HTTPS. HTTPS encrypts the traffic between your computer and Facebook making it more difficult to eavesdrop on your traffic (useful for example if you actually use open Wi-Fi access points). You should go to your settings and enable this right away.
Of course if you’re using HTTPS Everywhere you don’t have to worry about manually enabling this Facebook feature. Or you could add Facebook to NoScript’s force HTTPS section.