I touched on this here
The only feedback I received was “facebook”.
So…
As I personally am unable to engage facebookery, that leaves me flat.
As for the “opt in” email, I can tell you where MOST of the other “opt in” periodicals I have inbound go, unread, even if I am REALLY interested in the topics, but you probably already know…
PS: I still think a page for “monthly happenings” on the blog, making the RSS feed work, and promoting the blog more is the way to go…