For the past year we at Xiph have been using a SSL certificate for the following subdomains: svn, git, and trac.
The SSL certificate was kindly given to us by Certum at no cost.
Usually users do not notice that the SSL certificate is in place, unless the SSL certificate is not recognized by the web browser, which will complain that the web site is not safe to browse.
I would like to thank Certum for allowing us to have non scary user experience while browsing our web servers.
Edit 25.10.2010 The offer was valid for one year, this year we did not get the