I did this after reading the EFF's "Join us on June 5th to Reset the Net" article and the two linked articles at the bottom of the page.
If any accesses my sites with HTTPS, they have to look at my certificate and OK it. A pain.
Ask HN: How bad is it to use a self signed SSL certificate?
Also, suggestions for the cheapest/easiest ways to get signed certificates?
BTW, I used this article for configuring nginx for SSL: https://www.digitalocean.com/community/articles/how-to-set-up-multiple-ssl-certificates-on-one-ip-with-nginx-on-ubuntu-12-04