Thanks to the generous offerings from the Let’s Encrypt initiative and certificate authority, you can now find all content securely hosted. Because I am still somewhat suspicious of the automatic certification process provided by the official client and I serve this site with Nginx, I followed along the description of letsencrypt-nosudo for a semi-automatic process. All in all, it took about 15 minutes to get a free SSL certificate recognized by Firefox and Chrome.
Update: looks like one can also sign semi-automatically using the official client.
Update: Any problems should be solved now with the Let’s Encrypt certificate signed by IdenTrust.