You can (finally) add InMotion Hosting (VPS) to the list: http://imgur.com/a/4QfEQ
(though Support doesn't know or doesn't want me to know - spent an hour on the phone about root-access, PuTTy, shell and what not - only by sheer luck I found LE in cPanel - they never announced it either - probably still want to sell their $99 certs, but demand (and endless support tickets) convinced them this was a good idea?)
It only installs 3-month certs - is that default cPanel? Or IMH? How do I set it to auto-renew?
Thanks for providing this service - making the web a safer place.