This is pretty standard fare for a blog when on the single post view. It's poor flow to have to return to a list just to get to the next or previous post.
I've had a request for the ability to sign in with a LinkedIn account and the addition of LinkedShare buttons for all pages. Currently the only integration with LinkedIn I see is on the spread the word page.
Similar to the function of "Who can view this page?" I want anyone to be able to see it, but only supporters able to comment.
This seems pretty necessary for controling ramdom spam.