Hi there !
Digging around for post/comments subscription, I installed with succes your subscribe to email, MAGICALLY COMPATIBLE WITH BLOG REGISTRATION which was conditional for me.
But now we would need the same one for comments....
subscribe-to-double-opt-in-comments works fine, taking only the site subscibers, but it would be just great to add the "comments subriber" into the same "subscrbtion" menu as subscribe-to-double-opt-in-comments adds a menu in "settings" which is a bit confusing for users.
So waiting for wpmudev comment subscription plugin
Ho... already in the list ?