ACME v2 and Wildcard Certificate Support is Live
Let's Encrypt has announcedthat ACMEv2 (Automated Certificate Management Environment) and wildcardcertificate support is live. ACMEv2 is an updatedversion of the ACME protocol that has gone through the IETF standardsprocess. Wildcardcertificates allow you to secure all subdomains of a domain with asingle certificate. (Thanks to Alphonse Ogulla)